J-GLOBAL         Last updated: Dec 18, 2018 at 13:15

Academic & Professional Experience

Assistant Professor, Tohoku University Institute for Materials Research, Surface and Interface Research

Published Papers

Japanese Journal of Applied Physics      Sep 2018   [Refereed]
R. Iguchi, A. Yagmur, Y.-C. Lau, S. Daimon, E. Saitoh, M. Hayashi, K. Uchida
PHYSICAL REVIEW B   98(1) 014402-1-014402-11   Jul 2018   [Refereed]
Spin-to-heat current conversion effects have been investigated in bilayer films consisting of a paramagnetic metal (PM; Pt, W, and Ta) and a ferromagnetic metal (FM; CoFeB and permalloy). When a charge current is applied to the PM/FM bilayer film,...
T Seki, R Iguchi, K Takanashi, K Uchida
Journal of Physics D: Applied Physics   51(25) 254001-1-254001-6   Jun 2018   [Refereed]
We investigated anomalous Ettingshausen effect (AEE) and anomalous Nernst effect (ANE) for the identical device consisting of the FePt thin film. The temperature modulation due to the AEE was visualized using the active infrared emission microscop...
Ken-ichi Uchida, Shunsuke Daimon, Ryo Iguchi, Eiji Saitoh
NATURE   558(7708) 95-99   May 2018   [Refereed]
For thermoelectric cooling/heating using Peltier effects, junctions of two different conductors have been believed to be indispensable so far. Here we demonstrate Peltier cooling/heating in a single material without junctions. This is realized by ...
Ahmet Yagmur, Ryo Iguchi, Stephan Gepraegs, Andreas Erb, Shunsuke Daimon, Eiji Saitoh, Rudolf Gross, Ken-ichi Uchida
Journal of Physics D: Applied Physics   51(19) 194002-1-194002-6   May 2018   [Refereed]
The spin Peltier effect (SPE) in a junction comprising a compensated ferrimagnetic insulator, gadolinium iron garnet (GdIG), slab and a Pt film has been investigated by means of the lock-in thermography method. When a charge current is applied to ...
T. Seki, R. Iguchi, K. Takanashi, K. Uchida
Applied Physics Letters   112(15) 152403-1-152403-5   Apr 2018   [Refereed]
Spatial distribution of temperature modulation due to anomalous Ettingshausen effect (AEE) is visualized in a ferromagnetic FePt thin film with in-plane and perpendicular magnetization using the lock-in thermography technique. By comparing the AEE...
Akihiro Kirihara, Masahiko Ishida, Ryota Yuge, Kazuki Ihara, Yuma Iwasaki, Ryohto Sawada, Hiroko Someya, Ryo Iguchi, Ken-ichi Uchida, Eiji Saitoh, Shinichi Yorozu
Journal of Physics D: Applied Physics   51(15) 154002_1-154002_7   Apr 2018   [Refereed]
In this work, we show an all-oxide SSE device using ruthenium oxide (RuO2) as a conductive film. We found that both the sign and magnitude of the SSE-induced ISHE voltage appearing in the RuO2 film changes depending on the post annealing temperatu...
Ramos R, Wongjom P, Iguchi R, Yagmur A, Qiu Z, Pinitsoontorn S, Uchida K, Saitoh E.
Journal of Magnetism and Magnetic Materials   447 134-138   Feb 2018   [Refereed]
We have studied thermoelectric conversion in all-ferromagnetic CoδFe100-δ/YIG bilayer junctions as a function of the chemical composition δ. We performed measurements of the transverse thermoelectric voltage upon application of a magnetic field. T...
Ryuichi Itoh, Ryo Iguchi, Shunsuke Daimon, Koichi Oyanagi, Ken-ichi Uchida, Eiji Saitoh
PHYSICAL REVIEW B   96(18) 184422-1-184422-5   Nov 2017   [Refereed]
We report the observation of magnetic-field-induced suppression of temperature modulation dueto the spin Peltier effect (SPE) in a junction of paramagnetic metal Pt and ferrimagnetic insulator Y3Fe5O12 (YIG) at room temperature. The resultant temp...
Yusuke Hirayama, Ryo Iguchi, Xue-Fei Miao, Kazuhiro Hono, Ken-ichi Uchida
Applied Physics Letters   111(16) 163901-163901-5   Oct 2017   [Refereed]
We demonstrate the high-throughput measurement method for the magnetocaloric effect (MCE) by means of a lock-in thermography (LIT) technique. This method enables systematic magnetic-field and operation-frequency dependent measurements of the tempe...
D. Kobayashi, T. Yoshikawa, M. Matsuo, R. Iguchi, S. Maekawa, E. Saitoh, Y. Nozaki
PHYSICAL REVIEW LETTERS   119(7) 077202-1-077202-5   Aug 2017   [Refereed]
We demonstrate generation of alternating spin current via the spin-rotation coupling by using a Rayleigh-type surface acoustic wave propagating in a nonmagnetic Cu thin film. Ferromagnetic resonance caused by injecting the surface acoustic wave wa...
Shunsuke Daimon, Ken-ichi Uchida, Ryo Iguchi, Tomosato Hioki, Eiji Saitoh
PHYSICAL REVIEW B   96(2) 024424-1-024424-12   Jul 2017   [Refereed]
The spin Peltier effect, heat-current generation due to spin-current injection, in various metal (Pt, W, and Au single layers and Pt/Cu bilayer)/ferrimagnetic insulator (yttrium iron garnet: YIG) junction systems has been investigated by means of ...
Tomosato Hioki, Ryo Iguchi, Zhiyong Qiu, Dazhi Hou, Ken-ichi Uchida, Eiji Saitoh, Tomosato Hioki, Zhiyong Qiu, Dazhi Hou, Eiji Saitoh
APPLIED PHYSICS EXPRESS   10(7) 073002-1-073002-4   Jul 2017   [Refereed]
We have investigated the magnetic-field-induced suppression of longitudinal spin Seebeck effect (LSSE) by using the time-resolved measurement technique at room temperature. The result manifested the short time domain where the observed voltage is ...
Watanabe Shingo, Hirobe Daichi, Shiomi Yuki, Iguchi Ryo, Daimon Shunsuke, Kameda Mai, Takahashi Saburo, Saitoh Eiji
Scientific Reports   7 4576-1-4576-6   Jul 2017   [Refereed]
Spin pumping enables the generation of d.c. and gigahertz-band (GHz-band) voltages from an applied microwave via magnetization dynamics when combined with inverse spin Hall effects. However, generating such voltages in the in-between frequency reg...
Hashimoto Yusuke, Daimon Shunsuke, Iguchi Ryo, Oikawa Yasuyuki, Shen Ka, Sato Koji, Bossini Davide, Tabuchi Yutaka, Satoh Takuya, Hillebrands Burkard, Bauer Gerrit E. W, Johansen Tom H, Kirilyuk Andrei, Rasing Theo, Saitoh Eiji
Nature Communications   8 15859-1-15859-6   Jun 2017   [Refereed]
In a magnet, the wave motion of atomic spins serves as an elementary excitation, called a spin wave, and behaves like a fictitious particle. Although the dispersion relation, which encodes essential information of the kinetics, of spin waves gover...
Uchida K, Iguchi R, Daimon S, Ramos R, Anadon A, Lucas I, Algarabel P. A, Morellon L, Aguirre M. H, Ibarra M. R, Saitoh E.
Physical Review B   95(18) 184437-1-184437-8   May 2017   [Refereed]
The spin Peltier effect (SPE), heat-current generation as a result of spin-current injection, has been investigated in alternately-stacked Pt/Fe3O4 multilayer films. The temperature modulation induced by the SPE in the [Pt/Fe3O4] x n films was fou...
Ryo Iguchi, Koji Sato, Ken-ichi Uchida, Eiji Saitoh
JAPANESE JOURNAL OF APPLIED PHYSICS   56(4) 040306-1-040306-4   Mar 2017   [Refereed]
We have theoretically investigated the spin Hall magnetoresistance (SMR) and Rashba–Edelstein magnetoresistance (REMR), mediated by spin currents, in a ferrimagnetic insulator/nonmagnetic metal/heavy metal system in the diffusive regime. The...
Ryo Iguchi, Eiji Saitoh
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   86(1) 011003-1-011003-13   Jan 2017   [Refereed]
In this article, we provide methods for estimating inverse spin Hall effects (ISHEs) induced by using microwave-driven spin pumping (SP) as a spin-current generator. ISHE and SP induce an electromotive force at the ferromagnetic or spin-wave reson...
Iguchi Ryo, Uchida Ken-ichi, Daimon Shunsuke, Saitoh Eiji
Physical Review B   95(17)    2017   [Refereed]
Hirobe Daichi, Sato Masahiro, Kawamata Takayuki, Shiomi Yuki, Uchida Ken-ichi, Iguchi Ryo, Koike Yoji, Maekawa Sadamichi, Saitoh Eiji
Nature Physics   13(1) 30-34   2017   [Refereed]
Miura Asuka, Kikkawa Takashi, Iguchi Ryo, Uchida Ken-ichi, Saitoh Eiji, Shiomi Junichiro
Physical Review Materials   1(1)    2017   [Refereed]
Daichi Hirobe, Masahiro Sato, Takayuki Kawamata, Yuki Shiomi, Ken-ichi Uchida, Ryo Iguchi, Yoji Koike, Sadamichi Maekawa, and Eiji Saitoh
Nature Physics (advanced online publication)      2016
Yagmur, A. Karube, S. Uchida, K. Kondou, K. Iguchi, R. Kikkawa, T. Otani, Y. Saitoh, E.
Appl. Phys. Lett.   108(24) 242409   2016
Shunsuke Daimon, Ryo Iguchi, Tomosato Hioki, Eiji Saitoh, and Ken-ichi Uchida
Nature Communications   7 13754   2016
Hou, Dazhi Qiu, Zhiyong Iguchi, R. Sato, K. Vehstedt, E. K. Uchida, K. Bauer, G. E. W. Saitoh, E.
Nat. Commun.   7 12265   2016
Daimon, S.a and Iguchi, R.a and Uchida, K.a b and Saitoh, E
J Phys D   48(16) 164014   2015
Uchida, K.-I.a b c and Qiu, Z.c d and Kikkawa, T.a c and Iguchi, R.a c and Saitoh, E
Appl Phys Lett   106(5) 052405   2015
Haidar, S.M.a and Iguchi, R.a and Yagmur, A.a and Lustikova, J.a and Shiomi, Y.a b and Saitoh, E
J Appl Phys   117(18) 183906   2015
Iguchi, R. and Sato, K. and Hirobe, D. and Daimon, S. and Saitoh, E
Appl. Phys. Express   7(1) 013003   2014
Lustikova J, Shiomi Y, Qiu Z, Kikkawa T, Iguchi R, Uchida K, Saitoh E.
Journal of Applied Physics   116(15)    2014   [Refereed]
Iguchi, R and Ando, K. and Qiu, Z. and An, T. and Saitoh, E. and Sato, T.
Appl Phys Lett   102(2) 022406   2013
Iguchi, R and Ando, K. and An, T. and Saitoh, E. and Sato, T.
IEEE Trans Magn   48(11) 6332754   2012
Iguchi, R and Ando, K. and Takahashi, R. and An, T. and Saitoh, E. and Sato, T.
Jpn. J. Appl. Phys.   51(10) 103004   2012
Nakayama, H. and Tashiro, T. and Takahashi, R. and Kajiwara, Y. and Ohtani, T. and Ando, K. and Iguchi, R. and Uchida, K. and Yoshino, T. and Saitoh, E
Key Eng Mat   508 347-352   2012
Takahashi, R. and Iguchi, R. and Ando, K. and Nakayama, H. and Yoshino, T. and Saitoh, E
J Appl Phys   111(7) 07C307   2012
Iguchi, R and Ando, K. and Saitoh, E. and Sato, T.
J. Phys. Conf. Ser.   266(1) 012089   2011

Conference Activities & Talks

Generation of spin current by spin pumping under nonlinear magnetization dynamics
第77回応用物理学会秋季学術講演会   2016   
第77回応用物理学会秋季学術講演会   2016   
日本物理学会2016年秋季大会   2016   
日本物理学会2016年秋季大会   2016   
日本物理学会2016年秋季大会   2016