IRIE Akinobu

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Name
IRIE Akinobu
Affiliation
Utsunomiya University
Section
Graduate School of Engineering, Master's Courses・Doctor's Course
Job title
Professor
Degree
Doctor of Engineering(Nagaoka University of Technology), Master of Engineering(Nagaoka University of Technology)

Research Areas

 
 

Academic & Professional Experience

 
1992
 - 
2000
Utsunomiya University, Research Associate
 
2000
   
 
- Utsunomiya University, Associate Professor
 

Education

 
 
 - 
1992
Graduate School, Division of Engineering, Nagaoka University of Technology
 
 
 - 
1987
Faculty of Engineering, Nagaoka University of Technology
 

Published Papers

 
Yamaki Kazuhiro, Mochiku Takashi, Funahashi Shugo, Bamba Yoshihiro, Kitamura Michihide, Matsushita Yoshitaka, Irie Akinobu
APPLIED PHYSICS EXPRESS   11(11)    Nov 2018   [Refereed]
K. Yamaki, N. Kitagawa, S. Funahashi, Y. Bamba, A. Irie
Physica C: Superconductivity and its Applications   550 95-98   Jul 2018   [Refereed]
© 2018 Elsevier B.V. In this study, fine single crystals of the magnetic superconductor EuSr2RuCu2O8−δ(RuEu-1212) were successfully prepared using the partial melting technique. The obtained single crystals had a cubic shape, which coincides with ...
K. Yamaki, Y. Bamba, T. Mochiku, S. Funahashi, Y. Matsushita, A. Irie
Physica C: Superconductivity and its Applications   548 40-43   May 2018   [Refereed]
© 2018 Elsevier B.V. In this study, cubic single crystals of the magnetic superconductor Ru1−xSr2−yGd1+yCu2+xO8−δ (RuGd-1212) with typical dimensions of 100–150 µm in length were grown by the partial melting technique. Multiple 00l reflections wer...
Murata Kenichiro, Yamaki Kazuhiro, Irie Akinobu
IEICE TRANSACTIONS ON ELECTRONICS   E101C(5) 391-395   May 2018   [Refereed]
Yamaki Kazuhiro, Bamba Yoshihiro, Irie Akinobu
JAPANESE JOURNAL OF APPLIED PHYSICS   57(3)    Mar 2018   [Refereed]
K. Yamaki, Y. Bamba, A. Irie
Journal of Superconductivity and Novel Magnetism      Jan 2018   [Refereed]
© 2018, Springer Science+Business Media, LLC, part of Springer Nature. We investigate the single crystal growth of rutheno-cuprates, which are known to be magnetic superconductors. We attempted the single crystal growth of two systems, RuSr2GdCu2O...
Rahmonov Ilhom, Shukrinov Yury, Atanasova Pavlina, Zemlyanaya Elena, Streltsova Oksana, Zuev Maxim, Plecenik Andrej, Irie Akinobu
MATHEMATICAL MODELING AND COMPUTATIONAL PHYSICS 2017 (MMCP 2017)   173    2018   [Refereed]
Kulikov Kirill, Shukrinov Yury, Nashaat Majed, Irie Akinobu
MATHEMATICAL MODELING AND COMPUTATIONAL PHYSICS 2017 (MMCP 2017)   173    2018   [Refereed]
Murata Kenichiro, Otaka Kazuto, Yamaki Kazuhiro, Irie Akinobu
29TH INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY   871    2017   [Refereed]
Irie Akinobu, Watanabe Takashi, Yajima Yoshihiko, Yamaki Kazuhiro
29TH INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY   871    2017   [Refereed]
K. Yamaki, K. Murata, A. Irie
Physica C: Superconductivity and its Applications   529 40-43   Oct 2016   [Refereed]
© 2016 Elsevier B.V. In this study, Bi2Sr2Ca1−yYyCu2O8+δ (BSCYCO) single crystals with yttrium doping content of y = 0–0.30 were synthesized by a self-flux method. The critical temperature and c-axis lattice constant of BSCYCO were controlled by t...
Akinobu Irie, Keiji Akasaka, Yuri Kuranari, Yoshihiko Yajima, Kazuhiro Yamaki
2015 15th International Superconductive Electronics Conference, ISEC 2015      Jan 2016   [Refereed]
© 2015 IEEE. We have studied the emission properties of combined intrinsic Josephson junction (IJJ) stacks. The IJJ THz oscillators were fabricated by two different methods: standard Ar ion milling and hydrochloric acid modification processes. We ...
Irie Akinobu, Otsuka Masaya, Murata Kenichiro, Yamaki Kazuhiro, Kitamura Michihide
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   25(3)    Jun 2015   [Refereed]
HARA Shin, MARUOKA Masatomo, WATANABE Shinichi, IRIE Akinobu, SUGIYAMA Hitoshi, YOKOTA Kazutaka
Journal of JSEE   63(2) 2_79-2_83   2015   [Refereed]
Graduate School of Engineering, Utsunomiya University carried out a project to develop a series of education programs for postgraduate students to cultivate leadership spirits between 2010 and 2012. The program is centered on a PBL in which each g...
Yu M. Shukrinov, A. E. Botha, S. Yu Medvedeva, S. Yu Medvedeva, M. R. Kolahchi, A. Irie
Chaos   24    Sep 2014   [Refereed]
© 2014 AIP Publishing LLC. The phase dynamics of Josephson junctions (JJs) under external electromagnetic radiation is studied through numerical simulations. Current-voltage characteristics, Lyapunov exponents, and Poincaré sections are analyzed i...
I. R. Rahmonov, I. R. Rahmonov, Yu M. Shukrinov, Yu M. Shukrinov, A. Irie
JETP Letters   99 632-639   Jan 2014   [Refereed]
The phase dynamics of the system of long Josephson junctions whose length exceeds the Josephson penetration depth has been studied. The possibility of the appearance of a longitudinal plasma wave and parametric resonance has been demonstrated. Bot...
YAMAKI Kazuhiro, TAMURA Kouichi, IRIE Akinobu
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan)   49(7) 373-378   2014   [Refereed]
Terahertz emission from BSCCO single-crystal mesa structures has recently attracted considerable attention. Since power fed into the mesa is of the order of 106 W/cm3, a significant self-heating effect appears in I-V c...
Yu M. Shukrinov, S. Yu Medvedeva, S. Yu Medvedeva, A. E. Botha, M. R. Kolahchi, A. Irie
Physical Review B - Condensed Matter and Materials Physics   88    Dec 2013   [Refereed]
Detailed numerical simulations of the IV characteristics of a Josephson junction under external electromagnetic radiation show the devil's staircase within different bias current intervals. We have found that the observed steps form very precisely...
Yamaki Kazuhiro, Fusegi Ryosuke, Oikawa Dai, Irie Akinobu
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   23(3)    Jun 2013   [Refereed]
Oikawa Dai, Irie Akinobu, Yamaki Kazuhiro
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   23(3)    Jun 2013   [Refereed]
WATANABE Shinichi, TAKAKI Jyunji, MARUOKA Masatomo, HARA Shin, HASEGAWA Hiroshi, IRIE Akinobu, SUGIYAMA Hitoshi, YOKOTA Kazutaka
Journal of JSEE   61(6) 6_66-6_71   2013   [Refereed]
The Graduate School of Engineering, Utsunomiya University introduced a PBL program for Master’ s Degree course students in 2008. A team consists of four to six students from different departments, thus, they have different technical backgrou...
G. Oya, T. Miyasaka, M. Kitamura, A. Irie
Physics Procedia   36 343-348   Jan 2012   [Refereed]
© 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors. We have studied the response of stacks of intrinsic Josephson junctions (IJJs) of (Bi1-xPbx)2Sr2CaCu2Oy(x = 0.15) to injection of microwave o...
K. Yamaki, M. Tsujimoto, T. Yamamoto, T. Kashiwagi, H. Minami, A. Irie, K. Kadowaki
Journal of Physics: Conference Series   400    Jan 2012   [Refereed]
Terahertz electromagnetic waves are very useful for a number of security and medical applications. Recently, intense and coherent terahertz emission from high-Tc superconducting Bi2Sr2CaCu 2O8+δ (Bi2212) intrinsic Josephson junctions (IJJs) has be...
Irie Akinobu, Oikawa Dai, Oya Gin-ichiro
SUPERCONDUCTIVITY CENTENNIAL CONFERENCE 2011   36 199-204   2012   [Refereed]
Oikawa Dai, Irie Akinobu, Yamaki Kazuhiro, Oya Gin-ichiro
ADVANCES IN SUPERCONDUCTIVITY XXIV   27 312-315   2012   [Refereed]
WATANABE Shinichi, TAKAKI Jyunji, HASEGAWA Hiroshi, IRIE Akinobu, YOKOTA Kazutaka, SUGIYAMA Hitoshi
Journal of JSEE   59(5) 23-29   Sep 2011   [Refereed]
In this paper, we introduce spiral engineering education program of Innovation Center for Research and Engineering Education (ICREE) which has been founded since 2005 in order to carry out engineering education for undergraduate and graduate stud...
YOKOTA Kazutaka, WATANABE Shinichi, TAKAKI Jyunji, MARUOKA Masatomo, HASEGAWA Hiroshi, IRIE Akinobu, SUGIYAMA Hitoshi
Journal of JSEE   59(5) 109-114   Sep 2011   [Refereed]
Irie Akinobu, Arakawa Naohiro, Kitamura Michihide, Sakuma Hiroshi, Oya Gin-ichiro
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   21(3) 741-744   Jun 2011   [Refereed]
Othman Nurmiza Binti, Oya Gin-ichiro, Kitamura Michihide, Irie Akinobu
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   21(3) 176-179   Jun 2011   [Refereed]
WATANABE Shinichi, TAKAKI Jyunji, HASEGAWA Hiroshi, IRIE Akinobu, SUGIYAMA Hitoshi, YOKOTA Kazutaka
Journal of JSEE   59(2) 47-51   Mar 2011   [Refereed]
The present paper describes a student evaluation of Inter-Departmental core curriculum “Problem-Based Learning (PBL) ” in the Faculty of Engineering at Utsunomiya University. The PBL is implemented to the first-grade students as an ...
G. Oya, Y. Matsumoto, R. Hironaga, A. Irie
Physica C: Superconductivity and its Applications   470    Dec 2010   [Refereed]
We study the influence of inclination of magnetic field on Josephson-vortex flow in intrinsic Josephson junctions in (Bi1-xPb x)2Sr2CaCu2Oy (x = 0.15) single-crystals between 30 and 55 K. Three kinds of behavior of Josephson vortices is observed o...
HASEGAWA Hiroshi, WATANABE Shin'ichi, TAKAKI Junji, YOKOTA Kazutaka, IRIE Akinobu, SUGIYAMA Hitoshi
Journal of JSEE   58(4) 21-27   Jul 2010   [Refereed]
The present paper describes a core curriculum “Problem-Based Learning (PBL)” in the Faculty of Engineering at Utsunomiya University. The PBL is implemented to the first-grade students as an introductory engineering education, where st...
Kitamura Michihide, Irie Akinobu, Oya Gin-ichiro
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS   470(13-14) 582-591   Jul 2010   [Refereed]
J. Phys.: Conference Series   234(4) 042015-1-042015-5   2010   [Refereed]
Hirokazu Kaneoya, Akinobu Irie, Gin Ichiro Oya
IEEE Transactions on Applied Superconductivity   19 195-198   Jun 2009   [Refereed]
We have extensively studied the behavior of pronounced subgap structures on the quasiparticle branches of the current-voltage (7-V) characteristics of intrinsic Josephson junctions (IJJs) in (Bi|(x = 0.15,0.2) single crystals for their application...
Akinobu Irie, Gin Ichiro Oya
IEEE Transactions on Applied Superconductivity   19 730-733   Jun 2009   [Refereed]
We have numerically studied the effect of temperature on the flux-flow behavior in a stack of intrinsic Josephson junctions by using the inductive coupling Josephson junctions model taking into account thermal fluctuations. In the absence of noise...
A. Irie, Yu M. Shukrinov, G. Oya
Applied Physics Letters   93    Oct 2008   [Refereed]
The experimental evidence of the breakpoint on the current-voltage characteristics (IVCs) of the stacks of intrinsic Josephson junctions (IJJs) is presented. The influence of the capacitive coupling on the IVCs of Bi 2Sr2CaCu2 Oy IJJs has been inv...
Kitamura Michihide, Irie Akinobu, Oya Gin-ichiro
JOURNAL OF APPLIED PHYSICS   104(6)    Sep 2008   [Refereed]
A. Irie, G. Oya
Physica C: Superconductivity and its Applications   468 679-683   Apr 2008   [Refereed]
We have numerically investigated the vortex dynamics in a stack of intrinsic Josephson junctions (IJJs) having length L = 5 λJ. We performed simulations by using the perturbed, coupled sine-Gordon model taking into account thermal fluctuations. In...
A. Irie, G. Oya
Journal of Physics: Conference Series   97    Feb 2008   [Refereed]
The vortex dynamics in intrinsic Josephson junctions (IJJs) at finite temperatures has been investigated numerically by taking into account the thermal fluctuations. Our simulations based on the perturbed, coupled sine-Gordon model successfully re...
A. Irie, Yu M. Shukrinov, G. Oya
Journal of Physics: Conference Series   129    Jan 2008   [Refereed]
We have investigated the current-voltage characteristics (IVCs) of intrinsic Josephson junctions (IJJs). Recently, it is predicted that the longitudinal plasma wave can be excited by the parametric resonance in IJJs. Such an excitation induces a s...
Michihide Kitamura, Akinobu Irie, Gin Ichiro Oya
Physical Review B - Condensed Matter and Materials Physics   76    Aug 2007   [Refereed]
Conditions to observe Shapiro steps clearly and stably are studied for an intrinsic Josephson junction (IJJ) in Bi2 Sr2 Ca Cu2 O8+δ high- Tc superconductors. The current equation normalized by the critical current Ic (T) is solved fully numericall...
Irie Akinobu, Okano Shingo, Oya Gin-Ichiro
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY   17(2) 687-690   Jun 2007   [Refereed]
A. Irie, G. Oya
Superconductor Science and Technology   20    Feb 2007   [Refereed]
We have made a numerical study of the effect of thermal fluctuations on Josephson vortex dynamics in a stack of intrinsic Josephson junctions. Our simulations successfully reproduced the experimental results such as the field dependence of the cri...
Yoda Hidehiko, Ikedo Hideki, Ketsuka Takahiro, Irie Akinobu, Shiraishi Kazuo, Tsai Chen S.
IEEE PHOTONICS TECHNOLOGY LETTERS   18(13-16) 1554-1556   Jul 2006   [Refereed]
H. Kaneoya, A. Irie, G. Oya
Journal of the Korean Physical Society   48 1066-1069   May 2006   [Refereed]
We experimentally studied Josephson-vortex dynamics in Bi 2Sr2CaCu2Oy intrinsic Josephson junctions (IJJs). The current-voltage (I-V) characteristics of stacks of IJJs with a length of less than ten micrometers were measured in the presence and th...
G. Oya, T. Hashimoto, A. Irie
Superconductor Science and Technology   19    May 2006   [Refereed]
We have studied the Shapiro step response of intrinsic Josephson junctions (IJJs) in Bi2Sr2CaCu2Oy single crystals above 4.2 K, using mesa-shaped samples and cross-shaped samples to inject a microwave signal in a frequency frf range of 2-20.5 GHz....
S. Okano, A. Irie, G. Oya
Journal of the Korean Physical Society   48 1080-1083   May 2006   [Refereed]
We have fabricated and studied a dc superconducting quantum interference device (dc SQUID) based on intrinsic Josephson junctions in Bi 2Sr 2CaCu 2O y sin...
Gin Ichro Oya, Atsushi Terada, Nobuyuki Takahashi, Akinobu Irie, Taizo Hashimoto
Japanese Journal of Applied Physics, Part 2: Letters   44    Dec 2005   [Refereed]
We study the temperature dependent features of surface intrinsic Josephson junctions in the mesas of Bi2Sr2CaCu2O y single crystals and the Shapiro step response to injection of microwave in a frequencyrf range of 2-20.5 GHz of the junctions at el...
Michihide Kitamura, Akinobu Irie, Gin Ichiro Oya
Physica C: Superconductivity and its Applications   423 190-198   Jul 2005   [Refereed]
A self-consistent gap equation is modified for purely two-dimensional dx2-y2 symmetry singlet Cooper-pairs, and numerically solved by introducing a phenomenological pair interaction potential. It is found that the calculations including the pair i...
Akinobu Irie, Gin Ichiro Oya
IEEE Transactions on Applied Superconductivity   15 813-816   Jun 2005   [Refereed]
We report on the first observation of clear voltage modulation in dc SQUID based on intrinsic Josephson junctions of Bi2Sr2CaCu2Oy. Stacked series array of intrinsic Josephson junctions and dc SQUID based on it have been made from Bi2Sr2CaCu2Oysin...
G. Oya, T. Hayashi, H. Kaneoya, K. Kanda, A. Irie, N. J. Ali
IEEE Transactions on Applied Superconductivity   15 201-204   Jun 2005   [Refereed]
We have numerically and experimentally studied on the Josephson-vortex flow in stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2Oysingle crystals. Numerical simulations of static and dynamic behavior of Josephson vortices in such a stack were...
A. Saito, H. Ishida, K. Hamasaki, A. Irie, G. Oya
Applied Physics Letters   85 1196-1198   Aug 2004   [Refereed]
The low-frequency-voltage noise properties of intrinsic Josephson junctions (IJJ), with a small area stack in Bi-2212 single crystals, were investigated. The measured noise-voltage spectrum density Sv(f) was found to have a 1/f dependence on frequ...
A. Irie, Y. Kurosu, G. Oya
IEEE Transactions on Applied Superconductivity   13 908-911   Jun 2003   [Refereed]
We have investigated the rf-induced steps in intrinsic Josephson junctions in mesa-shaped Bi2Sr2CaCu2Oy single crystals. By applying rf signal in the frequency range 2-20 GHz to the mesa, two types of responses were observed depending on the frequ...
Atsushi Saito, Hiroki Ishida, Akinobu Irie, Akira Kawakami, Zhen Wang, Gin Ichiro Oya, Katsuyoshi Hamasaki
IEEE Transactions on Applied Superconductivity   13 904-907   Jun 2003   [Refereed]
We have measured the temperature dependence of the low-frequency noise properties across for mesa stacks of intrinsic Josephson junctions (IJJ's) in single crystals of Bi2Sr2CaCu2Oy(BSCCO) in the absence of an external magnetic field. The measured...
Gin Ichiro Oya, Gin Ichiro Oya, Akinobu Irie, Akinobu Irie
Physica C: Superconductivity and its Applications   372-376 110-114   Aug 2002   [Refereed]
We have studied the behavior of pronounced subgap structures in the current-voltage (I-V) characteristics of intrinsic Josephson junctions in (Bi1-xPbx)2Sr2CaCu2O y (with x = ∼0.15, ∼0.2) mesas at 4.2 K without and with 2-20 GHz microwave irradiat...
Michihide Kitamura, Akinobu Irie, Gin ichiro Oya
Physical Review B - Condensed Matter and Materials Physics   66 545191-5451910   Aug 2002   [Refereed]
A model to understand the overall profile of the quasiparticle (QP) tunneling current-voltage (I-V) characteristic of intrinsic Josephson junctions in high-Tcsuperconductors such as Bi2Sr2CaCu2O8+δis presented. It is mentioned that the angular dep...
Akinobu Irie, Akinobu Irie, Gin Ichiro Oya, Gin Ichiro Oya
Physica C: Superconductivity and its Applications   367 393-399   Feb 2002   [Refereed]
Tunneling properties of small-sized intrinsic Josephson junctions in Bi2Sr2CaCu2Oy single crystals have been investigated in order to understand their inherent properties. We have successfully fabricated mesas with lateral dimensions ranging from ...
Nazia Jabeen Ali, Akinobu Irie, Gin Ichiro Oya
IEICE Transactions on Electronics   E85-C 809-813   Jan 2002   [Refereed]
The size dependent properties of the intrinsic Josephson junctions in Bi2Sr2CaCu2Oysingle crystal mesas in the external magnetic field are studied. The mesas of (1-140) μm long with 7-29 junctions were fabricated and their current-voltage characte...
Michihide Kitamura, Akinobu Irie, Gin ichiro Oya
Physical Review B - Condensed Matter and Materials Physics   66 1-10   Jan 2002   [Refereed]
A model to understand the overall profile of the quasiparticle (QP) tunneling current-voltage (formula presented) characteristic of intrinsic Josephson junctions in high- (formula presented) superconductors such as (formula presented) is presented...
Yu M. Shukrinov, Yu M. Shukrinov, Kh Nasrulaev, M. Sargolzaei, G. Oya, G. Oya, A. Irie, A. Irie
Superconductor Science and Technology   15 178-182   Jan 2002   [Refereed]
The subgap structure in current-voltage (I-V) characteristics of a stack of intrinsic Josephson junctions in high-Tc superconductors is studied. An analytical formula for the I-V characteristics is obtained which had taken into account the influen...
A. Irie, A. Irie, T. Mimura, M. Okano, G. Oya, G. Oya
Superconductor Science and Technology   14 1097-1101   Dec 2001   [Refereed]
In order to understand the intrinsic Josephson tunnelling properties, the current-voltage (I-V) characteristics of small-sized intrinsic Josephson junctions in (Bi1-xPbx)2Sr2 CaCu2Oy (B(P)SCCO) single crystals with x = 0, 0.15 and 0.2 are investig...
A. Saito, K. Hamasaki, A. Irie, G. Oya
Journal of Applied Physics   90 2911-2914   Sep 2001   [Refereed]
We have measured the low-frequency voltage noise properties across mesa stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2Oy (BSCCO) single crystals as a function of bias voltage. The BSCCO mesas with area of 160×40 μm2 were fabricated on the ...
A. Irie, A. Irie, A. Irie, G. Oya, G. Oya, R. Kleiner, P. Müller
Physica C: Superconductivity and its Applications   362 145-149   Sep 2001   [Refereed]
Transport properties of small-sized intrinsic Josephson junctions in Bi2Sr2CaCu2Oy have been systematically investigated with respect to both junction size and temperature. Using electron-beam lithography and Ar ion milling, we have successfully f...
Gin ichiro Oya, Gin ichiro Oya, Gin ichiro Oya, Akinobu Irie, Akinobu Irie
Physica C: Superconductivity and its Applications   362 138-144   Sep 2001   [Refereed]
We have investigated the pronounced subgap structures in intrinsic Josephson junctions of (Bi1-xPbx)2Sr2CaCu 2Oy mesas with x≲0.2. The structures appear to be composed of multiple subbranches on quasiparticle branches in the current-voltage charac...
M. Werner, A. Saito, K. Hamasaki, A. Irie, G. Oya
Bauwirtschaft - BW   55 19-21   Apr 2001   [Refereed]
Atsushi Saito, Katsuyoshi Hamasaki, Akinobu Irie, Gin Ichiro Oya
IEEE Transactions on Applied Superconductivity   11 304-307   Mar 2001   [Refereed]
Low frequency noise properties have been investigated in mesa-type Bi2Sr2CaCu2O8+x (BSCCO) intrinsic Josephson junction. The junction area for this mesa was 160 μm×40 μm. The mesa showed highly hysteretic current-voltage characteristic at low temp...
A. Irie, S. Heim, S. Schromm, M. Mößle, T. Nachtrab, M. Gódo, R. Kleiner, P. Müller, G. Oya
Phsy. Rev. B   62(10) 6681-6686   Sep 2000   [Refereed]
We present a study of the critical currents of small sized intrinsic Josephson junction stacks in external magnetic fields applied parallel to the CuO2 layers. The stacks consisting of 5-12 junctions were realized as mesa structures patterned on t...
S. Heim, A. Irie, S. Schromm, M. Mößle, S. Rother, R. Kleiner, R. Kleiner, P. Muller
Physica C: Superconductivity and its Applications   341-348 1567-1568   Jan 2000   [Refereed]
We patterned small size mesa structures on top of single crystals of the high temperature superconductor Bi2Sr2CaCu2O8+δusing a combination of photolithography and electron beam lithography. The mesas consisted typically of 4-12 intrinsic Josephso...
Akinobu Irie
International Journal of Modern Physics B   13 3678-3681   Dec 1999   [Refereed]
We have studied the vortex dynamics in intrinsic Josephson junctions in mesa-shaped Bi2Sr2CaCu2Oy single crystals. By applying magnetic fields parallel to the copper oxide layers of the junctions, Josephson vortex-flow branches were observed in ad...
A. Irie, Y. Hirai, G. Oya
Applied Physics Letters   72(17) 2159-2161   Dec 1998   [Refereed]
We report the observation of the highest velocity mode of Josephson vortex motion in mesas consisting of 5-15 intrinsic Josephson junctions with an area of 37×30 μm2on Bi2Sr2CaCu2Oysingle crystals. By applying the dc magnetic field parallel to CuO...
Gin Ichiro Oya, Gin Ichiro Oya, Akinobu Irie
Physica C: Superconductivity and its Applications   293 149-155   Jan 1997   [Refereed]
The effect of Pb-substitution on the crystal structures and current-voltage characteristics in the c-direction of Bi2Sr2CaCu2Oy. (BSCCO) and (Bi1-xPbx)2Sr2CaCu2Oy(BPSCCO) (with x ≤ ∼ 0.25) single crystals is investigated. The Bi-type incommensurat...
A. Irie, G. Oya, G. Oya
Physica C   293(1/4) 249-253   Jan 1997   [Refereed]
The microwave-induced phase-locking phenomena in the intrinsic Josephson junctions in Bi2Sr2CaCu2Oysingle crystal mesas have been investigated experimentally. For the mesas with the dimensions much larger than the Josephson penetration depth, obvi...
Irie Akinobu, Oya Gin-ichiro
Journal of the Japan Institute of Metals and Materials   61(9) 862-868   1997   [Refereed]
We have systematically studied the structural change and properties of intrinsic Josephson junctions in (Bi1&minus;xPbx)2Sr2CaCu2Oy single crystals with x</I...
Gin Ichiro Oya, Akinobu Irie
Physica C   263 453-456   Jan 1996   [Refereed]
The fluxon motion excited by external microwaves has been investigated in naturally stacked, intrinsic Josephson junctions of Bi2Sr2CaCu2Oy single crystals. For mesa-shaped single-crystals in cavity resonant modes, either odd or even order subharm...
A. Irie, M. Iwama, G. Oya
Supercond. Sci. Technol.   9(4A) A14-A17   Jan 1996   [Refereed]
We have been investigated the current-voltage characteristics of naturally stacked intrinsic Josephson junctions in mesa-shaped Bi2Sr2CaCu2Oysingle crystals, having dimensions in the ab plane larger than the Josephson penetration depth, without an...
A. Irie, G. Oya
IEEE Transactions on Applied Superconductivity   5(2 Pt 3) 3267-3271   Jan 1995   [Refereed]
We have studied the microwave response of an array of intrinsic Josephson junctions in the c-axis direction in large BSCCO single crystals indicating multiple resistive branches on the I-V characteristics. Under the 8-10GHz microwave irradiation, ...
Akinobu Irie, Masayuki Sakakibara, Gin ichiro Oya
IEICE Transactions on Electronics   E77-C 1191-1198   Aug 1994   [Refereed]
Single crystals of (Bi, Pb)2Sr2CaCu2Oy were systematically grown, characterized, and investigated for their tunnelling properties and the intrinsic Josephson effects as a function of the nominal composition of Pb, x. It was observed that Pb atoms ...
A. Irie, G. Oya
Physica C: Superconductivity and its applications   235-240 3277-3278   Jan 1994   [Refereed]
The intrinsic Josephson effects in the c-axis directions in large Bi2Sr2CaCu2Oy(BSCCO) single crystals have been studied. The large single crystal under 9 GHz microwave irradiation showed an rf-induced current peak on the I-V characteristic. The v...
SAKAKIBARA Masayuki, OYA Gin-ichiro, IRIE Akinobu
The Transactions of the Institute of Electronics,Information and Communication Engineers. C-(0xF9C2)   76(6) 391-397   Jun 1993   [Refereed]
自己フラックス法により(Bi,Pb)_2Sr_2CaCu_2O_y単結晶を成長し,その結晶構造の均一性が異なるいくつかの結晶について,c軸方向の超伝導特性(抵抗-温度(R-T)特性,臨界電流-温度(I_c-T)特性,電流-電圧(I-V)特性,マイクロ波応答特性等)を測定した.比較的均質な結晶の場合にのみ,そのI_c-T特性がAmbegaokar-Baratoff理論にほぼ従うと共に,I-V特性上に分枝構造を含む大きなヒステリシスが観測され,更に,マイクロ波照射に対しそのI-V特性上に定電圧...
Gin Iichiro Oya, Naoto Aoyama, Akinobu Irie, Satoru Kishida, Heizo Tokutaka
Jpn. J. Appl. Phys.   31(7A) L829   Jan 1992   [Refereed]
The dependences of critical current on the temperature and magnetic field and the current-voltage characteristics in response to incident microwave radiation are measured in the direction of the c-axis of the 80 K superconducting phase (Bi, Pb)2Sr...
Shiro Nagaoka, Akinobu Irie, Katsuyoshi Hamasaki, Katsuyoshi Hamasaki, Tsutomu Yamashita
Electronics and Communications in Japan (Part II: Electronics)   74 71-77   Jan 1991
NbN nanobridge dc SQUIDs were fabricated by the field evaporation method and their noise characteristics were evaluated. The fabricated device has a magnetic flux‐voltage conversion efficiency Φ of about 2.5 mV/Φ0and hence the device has a higher ...
A. Irie, T. Matsui, K. Hamasaki, B. Komiyama, T. Yamashita
IEEE Transaction of Magnetics   27(2) 2967-2970   Jan 1991   [Refereed]
High-gain dc SQUIDs using NbN nanobridges have been fabricated for magnetometers with high sensitivity, and their device parameters and intrinsic energy sensitivity have been evaluated. The slit inductance of the square washer SQUID was reduced by...
A. Irie, H. Kurosawa, H. Yamane, H. Sasahara, T. Hirai, T. Yamashita
IEEE Transaction of Magnetics   27(2) 3032-3035   Jan 1991   [Refereed]
Using the YBa2Cu3O7-X thin film deposited by MOCVD, we have fabricated the dc SQUID operated at 77K. The SQUIDs with microbridges are patterned by chemical and laser etching process. These SQUIDs operate stably without hysteresis in quite a wide r...
A. Irie, H. Abe, K. Mori, M. Hatle, K. Hamasaki
Conference on Solid State Devices and Materials   453-455   Jan 1991   [Refereed]
We have fabricated various-type NbN nanobridge dc SQUIDs. From the analyses of the response to magnetic field, it is found that the current-phase relationship for the planar type nanobridge and the nanobridge fabricated by field evaporation is clo...
Akinobu Irie, Hiroya Abe, Michal Hatle, Katsuyoshi Hamasaki
Japanese Journal of Applied Physics   30 3925-3928   Jan 1991   [Refereed]
We have fabricated two types of NbN nanobridge dc Superconducting QUantum Interference Devices (SQUIDs). From the analyses of the response to magnetic field, it is found that the current-phase relationship for the planar-type nanobridge and the na...
K. Hamasaki, A. Irie, Z. Wang, T. Yamashita, K. Watanabe
Advances in Cryogenic Engineering   36 377-383   Dec 1990   [Refereed]
Reliable process technology is required in order to prepare the high TcNBN layers with good surface and interface morphologies. The preparation of highly oriented MgO films is of great scientific interest and of practical applications such as tunn...
Akinobu Irie, Katsuyoshi Hamasaki, Tsutomu Yamashita
Electronics and Communications in Japan (Part II: Electronics)   73 88-96   Jan 1990
A high‐gain dc‐SQUID using NbN nanobridges has been fabricated for biomedical magnetic measurements, and its device parameters and intrinsic energy sensitivity have been evaluated. Since the fabricated device uses NbN nanobridges for Josephson jun...
Tsutomu Yamashita, Masanori Era, Satoru Noge, Akinobu Irie, Hisanori Yamane, Toshio Hirai, Hideyuki Kurosawa, Toshiaki Matsui
Japanese Journal of Applied Physics   29 74-78   Jan 1990   [Refereed]
Single crystallike microbridges are fabricated from YBa2Cu3O7-δthin films made by the CVD method. The thicknesses of the bridges range from 0.2 to 1 µm, and the width and length are both about 1 µm. The critical current densities of the bridges ra...
Akinobu Irie, Masanori Era, Tsutomu Yamashita, Hideyuki Kurosawa, Hideyuki Kurosawa, Hisanori Yamane, Hisanori Yamane, Toshio Hirai, Toshio Hirai
Japanese Journal of Applied Physics.   28(10)    Jan 1989   [Refereed]
Using YBa2Cu3O7-x(YBCO) thin films (0.5∼1.0 µm in thickness) with c axis orientation, we fabricated dc superconducting quantum interference devices (SQUIDs). YBCO films were deposited on MgO(100) single-crystal infstrates by MOCVD. These films exh...
Shiro Nagaoka, Katsuyoshi Hamasaki, Akinobu Irie, Tsutomu Yamashita, Masanori Kougo
Electronics and Communications in Japan (Part II: Electronics)   72 96-102   Jan 1989
This paper describes the method for producing a nanobridge‐type SQUID, the LsIo/ϕOratio of which can be regulated to an optimal value at the liquid He temperature (4.2 K), and the properties of the SQUID. An epitaxial NbN film is produced by the r...

Misc

 
木村 椋, 村田 健一郎, 八巻 和宏, 入江 晃亘
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   118(11) 1-5   Apr 2018
村田 健一郎, 大高 和人, 八巻 和宏, 入江 晃亘
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117(10) 47-51   Apr 2017
Yamaki Kazuhiro, Bamba Yoshihiro, Irie Akinobu
Meeting Abstracts of the Physical Society of Japan   72(0) 2376-2376   2017
<p>ルテニウム系銅酸化物超伝導体は磁気秩序と超伝導が共存する可能性がある物質として知られているものの,5元系の分解溶融型化合物であり,結晶成長が極めて難しいため,この系の磁性と超伝導の共存に関する問題は未だに完全に解明されたとは言い難い.我々はルテニウム系銅酸化物高温超伝導体の単結晶成長に取り組んでおり,最近,1212相の一辺50マイクロメートル程度の単結晶の合成に成功したので報告する.</p>
YAMAKI Kazuhiro, TAMURA Kouichi, IRIE Akinobu
Technical report of IEICE. SCE   113(401) 85-90   Jan 2014
Terahertz emission from BSCCO single crystal mesa structure has recently attracted considerable attention. Since the power fed into the mesa is on the order of 10^6 W/cm^3, the self-heating effects appear significantly in I-V characteristics. We h...
Uchiumi Yoshitaka, Kitamura Michihide, Irie Akinobu
Meeting Abstracts of the Physical Society of Japan   69(0)    2014
YOKOTA Kazutaka, MARUOKA Masatomo, WATANABE Shinichi, HARA Shin, IRIE Akinobu, SUGIYAMA Hitshi
Proceedings of Annual Conference of Japanese Society for Engineering Education   2013(0) 660-661   2013
Oikawa Dai, Aoki Kota, Tamura Koichi, Irie Akinobu, Yamaki Kazuhiro, Oya Gin-ichiro
Proceedings of the IEICE General Conference   2012(2)    Mar 2012
WATANABE Shinichi, TAKAKI Junji, MARUOKA Masanori, IRIE Akinobu, SUGIYAMA Hitoshi, YOKOTA Kazutaka
Proceedings of Annual Conference of Japanese Society for Engineering Education   2012(0) 316-317   2012
MARUOKA Masatomo, IRIE Akinobu, WATANABE Shinichi, YANAGAWA Takayuki, SAKURAI Tetsuma
Proceedings of Annual Conference of Japanese Society for Engineering Education   2012(0) 602-603   2012
WATANABE Shinichi, TAKAKI Junji, IRIE Akinobu, YOKOTA Kazutaka
Proceedings of Annual Conference of Japanese Society for Engineering Education   2011(0) 704-705   2011
ARAKAWA Naohiro, OTANI Masahiro, WATANABE Taichi, IRIE Akinobu, YOKOTA Kazutaka, SUGIYAMA Hitoshi
工学・工業教育研究講演会講演論文集   22 132-133   Aug 2010
IRIE Akinobu, WATANABE Shinichi, TAKAKI Jyunji, YOKOTA Kazutaka, SUGIYAMA Hitoshi
工学・工業教育研究講演会講演論文集   22 574-575   Aug 2010
WATANABE Shinichi, TAKAKI Junji, HASEGAWA Hiroshi, IRIE Akinobu, YOKOTA Kazutaka, SUGIYAMA Hitoshi
工学・工業教育研究講演会講演論文集   22 544-545   Aug 2010
SUGIYAMA Hitoshi, WATANABE Shinichi, TAKAKI Junji, IRIE Akinobu
工学・工業教育研究講演会講演論文集   22 46-47   Aug 2010
IRIE Akinobu, KONISHI Masahiro, ARAKAWA Naohiro, OYA Gin-ichiro
電気学会研究会資料. MAG, マグネティックス研究会   2009(60) 1-5   Aug 2009
IRIE Akinobu, OYA Gin-ichiro
IEICE technical report   108(152) 25-30   Jul 2008
Ketsuka Takahiro, Ikedo Hideki, Yoda Hidehiko, Irie Akinobu, Tsai Chen S., Shiraishi Kazuo
Proceedings of the IEICE General Conference   2006(1)    Mar 2006
Kazuo Shiraishi, Chen S. Tsai, Chen S. Tsai, Hidehiko Yoda, Kazushi Minagawa, Akinobu Irie
Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest   2005 485-486   Dec 2005
An efficient spot size converter using a micro GRIN slab chip with a hemi-cylindrical endface for conversion between single-mode fibers and fine-core waveguides has been successfully fabricated by means of the focused ion-beam etching technique.
Minagawa Kazushi, Ketsuka Takahiro, Yoda Hidehiko, Irie Akinobu, Tsai Chen S., Shiraishi Kazuo
Proceedings of the IEICE General Conference   2005(1)    Mar 2005
Ishida H., Saito A., Okanoue K., Kawakami A., Wang Z., Irie A., Oya G., Hamasaki K.
Technical report of IEICE. SCE   103(367) 15-20   Oct 2003
1/f noise properties in Nb, NbN-based tunnel junctions and Bi-2212 intrinsic tunnel junctions have been investigated. We found that Nb and NbN-based junctions exhibit η(1/f noise parameter) vs. A(E) (Andreev reflection probability) curve scales ap...
ISHIDA H., SAITO A., OKANOUE K., KAWAKAMI A., WANG Z., IRIE A., OYA G., HAMASAKI K.
電子情報通信学会技術研究報告. SCE, 超伝導エレクトロニクス   103(367) 15-20   Oct 2003
IRIE A., OYA G.
Technical report of IEICE. SCE   100(399) 1-6   Oct 2000
Transport properties of small-sized intrinsic josephson in Bi_2Sr_2CaCu_2O_y have been systematically investigated with respect to both junction size and temperature. Using electron-beam lithography, we have successfully fabricated mesas with late...
Low freguency noise properties of Bi2Sr2CaCu2Oy intriusic Josephson junctions(共著)
Advances in Supercond.   X11 1120-1122   1999
Dynamics of Josephson vortices in intrinsic Josephson junctions in Bi2Sr2CaCu2Oy single crystal mesas
Inst. Phys. Conf. Ser.   167 221-224   1999
International Journal of Modern Physics B   13(29/31) 3718-3720   1999
International Journal of Modern Physics B   13(29/31) 3678-3681   1999
Intrinsic Josephson effects and vortex dynamic properties in layered hig-temperature superconductors(共著)
Recent Res. Denvel. Applied Phys.   429-452   1999
Irie Akinobu, Kaneko Shoichi, Oya Gin-ichiro
Proceedings of the Society Conference of IEICE   1998(2)    Sep 1998
Structural Change and Characteristics of Intrinsic Josephson Junctions in(Bi1-xPbx)2Sr2CaCu2Oy Single Crystals
61(9) 862   1997
Modulation of critical current in three terminal devices composed of BSCCO single crystals
5th International Superconductive Electronic Conference (ISEC'95) Extended Abstracts   278   1995
Growth and tunneling properties of (Bi, Pb)2Sr2CaCu2Oy single crystals
IEICE Trans. on Electronics   (E77-C)    1994
Flue Flow behavior in the intrinsic Josephson junctions in Bi2Sr2CaCu2Oy single crystals
Physica C   235-240   1994
Tosephson Junctionlike Behaviors in (Bi, Pb)2Sr2CaCu2Oy Crystals Grown by a Self-Flux Method
Trans. of IEICE   J76-C-II(6) 391   1993
Curvent-Voltage Characteristics of Nb/(Bi, Pb)2 SrzCaCu2Ox/Nb Point Contact Junctions
Advances in Superconductivity V   85    1993
Fabrication and Noise Properties of NbN nanobridge dc SQUID
Japanese Journal of Applied Physics.   30    1991
Fabrication of High-Gain dc-SQUID Magnetometer with NbN Nanobridges
The Institute of Electronics, Information and Communication Engineers   J72-C-(]G0002[)(8)    1989

Books etc

 
Tunneling phenomena in the intrinsic Josephson junction of high-temperature superconducting Bi2Sr2CaCu2O8+., Recent Res. Devel. Phys.
G. Oya, A. Irie, M. Kitamura (Part:Joint Work)
Transworld Research Network   2004   
Intrinsic Josephson effects and vortex dynamic properties in layered high-temperature superconductors: Recent Res. Devel. Applied Phys.
G. Oya, A. Irie (Part:Joint Work)
Transworld Research Network   1999   
Phase locking of fluxons in intrinsic Josephson Junctions of BSCCO single crystals to external if signal
Applied Superconductivity 1995   1995   

Research Grants & Projects

 
Study on superconducting devices
Development of nanodevice using superconductor superlatice