一敬 - My portal - researchmap

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J-GLOBAL ID: 202001013655589121
researchmap Member ID: B000381789

Papers

Possible quantum Hall effect in a magnetic-field-induced phase transition in the quasi-one-dimensional CDW organic conductor, HMTSF-TCNQ

Keizo Murata, Yuhei Fukumoto, Keiichi Yokogawa, Woun Kang, Ryo Takaoka, Ryota Tada, H. Hirayama, James S. Brooks, David Graf, Harukazu Yoshino, Takahiko Sasaki, Reizo Kato

PHYSICA B-CONDENSED MATTER, 460 241-244, Mar, 2015 Peer-reviewed
Uniaxial-Strain-Orientation Dependence of the Competition between Mott and Charge Ordered Phases and their Corresponding Superconductivity of beta-(BDA-TTP)(2)I-3

Md Nuruzzaman, Keiichi Yokogawa, Harukazu Yoshino, Haruo Yoshimoto, Koichi Kikuchi, Takayuki Kaihatsu, Jun-ichi Yamada, Keizo Murata

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(12), Dec, 2012 Peer-reviewed
Pressure Effect on Organic Conductors

Keizo Murata, Keiichi Yokogawa, Sonachalam Arumugam, Harukazu Yoshino

CRYSTALS, 2(4) 1460-1482, Dec, 2012 Peer-reviewed
Field-induced CDW in HMTSF-TCNQ

Keizo Murata, Woun Kang, Kosuke Masuda, Tetsuji Kuse, Takahiko Sasaki, Keiichi Yokogawa, Harukazu Yoshino, James S. Brooks, Eun Sang Choi, Andhika Kiswandhi, Reizo Kato

PHYSICA B-CONDENSED MATTER, 407(11) 1927-1929, Jun, 2012 Peer-reviewed
Uniaxial Strain Orientation Dependence of Superconducting Transition Temperature (T-c) and Critical Superconducting Pressure (P-c) in beta-(BDA-TTP)(2)I-3

Koichi Kikuchi, Takayuki Isono, Masayuki Kojima, Haruo Yoshimoto, Takeshi Kodama, Wataru Fujita, Keiichi Yokogawa, Harukazu Yoshino, Keizo Murata, Takayuki Kaihatsu, Hiroki Akutsu, Jun-ichi Yamada

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 133(49) 19590-19593, Dec, 2011 Peer-reviewed
Field-Induced Successive Phase Transitions in the Charge Density Wave Organic Conductor HMTSF-TCNQ

Keizo Murata, Keiichi Yokogawa, Kensuke Kobayashi, Kosuke Masuda, Takahiko Sasaki, Yuki Seno, Natarajan Rani Tamilselvan, Harukazu Yoshino, James S. Brooks, Denis Jerome, Klaus Bechgaard, Mikio Uruichi, Kyuya Yakushi, Yoshio Nogami, Reizo Kato

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(10), Oct, 2010 Peer-reviewed
First observation of superconductivity by uniaxial strain in (TMTTF)(2)X-salt

Keiichi Yokogawa, Harukazu Yoshino, Toshikazu Nakamura, James S. Brooks, Keizo Murata

PHYSICA B-CONDENSED MATTER, 405(11) S291-S294, Jun, 2010 Peer-reviewed
Pressure transmitting medium Daphne 7474 solidifying at 3.7 GPa at room temperature

Keizo Murata, Keiichi Yokogawa, Harukazu Yoshino, Stefan Klotz, Pascal Munsch, Akinori Irizawa, Mototsugu Nishiyama, Kenzo Iizuka, Takao Nanba, Tahei Okada, Yoshitaka Shiraga, Shoji Aoyama

REVIEW OF SCIENTIFIC INSTRUMENTS, 79(8), Aug, 2008 Peer-reviewed
Evidence for strong pi-d interaction in beta-(EDT-DSDTFVSDS)(2)FeBr4

Tsutomu Fujimoto, Syuma Yasuzuka, Keiichi Yokogawa, Harukazu Yoshino, Toshiki Hayashi, Hideki Fujiwara, Toyonari Sugimoto, Keizo Murata

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77(1), Jan, 2008 Peer-reviewed
Solidification of high-pressure medium Daphne 7373

Keiichi Yokogawa, Keizo Murata, Harukazu Yoshino, Shoji Aoyama

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 46(6A) 3636-3639, Jun, 2007 Peer-reviewed
Metal-semiconductor structural phase transitions and antiferromagnetic orderings in (Benzo-TTFVO)(2)center dot MX4 (M = Fe, Ga; X = Cl, Br) salts

Takashi Hiraoka, Hideki Fujiwara, Toyonari Sugimoto, Hiroyuki Nakazumi, Satoru Noguchi, Akihiro Kuribayashi, Takekazu Ishida, Keiichi Yokogawa, Keizo Murata, Takehiko Mori, Hiroko Aruga-Katori, Shojiro Kimura, Masayuki Hagiwara

JOURNAL OF MATERIALS CHEMISTRY, 17(17) 1664-1673, 2007 Peer-reviewed
Magnetoresistance effects evidencing the pi-d interaction in metallic organic conductors, (EDT-DSDTFVO)(2)center dot MX4 (M = Fe, Ga; X = Cl, Br)

Hideki Fujiwara, Toshiki Hayashi, Toyonari Sugimoto, Hiroyuki Nakazumi, Satoru Noguchi, Lin Li, Keiichi Yokogawa, Syuma Yasuzuka, Keizo Murata, Takehiko Mori

INORGANIC CHEMISTRY, 45(15) 5712-5714, Jul, 2006 Peer-reviewed
Evidence for the pi-d interaction comparing magnetoresistance in (EDT-DSDTFVO)(2)X, X=FeCl4, GaCl4

Lin Li, Syuma Yasuzuka, Yufeng Weng, Keiichi Yokogawa, Tsutomu Fujimoto, Toyonari Sugimoto, Hideki Fujiwara, Toshiki Hayashi, Takashi Hiraoka, Keizo Murata

JOURNAL OF LOW TEMPERATURE PHYSICS, 142(3-4) 469-472, Feb, 2006 Peer-reviewed

Misc.

Theoretical and experimental studies of pumpdown curves in low and medium vacuum

Fukuda Tsuneo, Yokogawa Keiichi

Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science, 2019, 2019
An Examination of the Pumpdown Equation in the Low and Medium Vacuum Regions

YOKOGAWA Keiichi, SETO Kohei, FUKUDA Tsuneo

Vacuum and Surface Science, 61(5) 292-295, 2018
Pumpdown equation in low and medium vacuum regions.

Yokogawa Keiichi, Seto Kohei, Fukuda Tsuneo

Abstract of annual meeting of the Surface Science of Japan, 37, 2017
23pAC-1 New Pressure Medium, solidifying at higher pressure than Daphne7474

Murata K, Hashimoto H, KLOTZ Stefan, Aoki S, Kobessho M, Yamanaka M, Yokogawa K, Hirayama H, Yoshino H, Uwatoko Y, Uragami C

Meeting Abstracts of the Physical Society of Japan, 70 1865-1865, 2015
17pAF-2 Phase Boundary of Landau-Quantum Limit in the Magnetic-Field-Induced Phase in HMTSF-TCNQ

Murata K, Tada R, Graf David, Kikugawa N, Brooks James S, Yokogawa K, Yoshino H, Kato R

Meeting Abstracts of the Physical Society of Japan, 70 1573-1573, 2015
29pAG-4 Development of Ultra-High Pressure Cell for Teaching Materials and Practical Use of Strain Gauge

Yokogawa Keiichi, Hirayama Hikaru, Tada Ryota, Murata Keizo

Meeting Abstracts of the Physical Society of Japan, 69 453-453, 2014
28aBC-1 Magneteic-Field-Induced States in HMTSF-TCNQ V

Murata K, Kiswandhi A, Kikugawa N, Sasaki T, Kato R, Fukumoto Y, Hirayama H, Tada R, Kang W, Yokogawa K, Yoshino H, Brooks J.S, Graf D

Meeting Abstracts of the Physical Society of Japan, 69 840-840, 2014
Condensed Matter Physics Laboratory, Department of Physics, Graduate School of Science, Osaka City University

YOKOGAWA Keiichi

The Review of High Pressure Science and Technology, 23(1) 68-69, Feb 20, 2013
27pXF-1 Hall effect in field induced phase of HMTSF-TCNQ under pressure of 1GPa

Kang W, Graf D, Kiswandhi A, Choi E. S, Brooks J. S

Meeting Abstracts of the Physical Society of Japan, 68 936-936, 2013
27pXF-2 The Magnetoresistance of HMTSF-TCNQ under 1GPa and field up to 45T

Fukumoto Y, Fujiwara H, Yoshino H, Sasaki T, Kato R, Murata K, Takaoka R, Yokogawa K, Kang W, Winter L, Shermane B, Kiswandhi A, Graf D, Brooks J. S

Meeting Abstracts of the Physical Society of Japan, 68 936-936, 2013
27pXF-3 Field-induced phase of HMTSF-TCNQ under pressure of 1GPa, II

Takaoka R, Fujiwara H, Yoshino H, Sasaki T, Kato R, Murata K, Fukumoto Y, Yokogawa K, Kang W, Winter L, Shermane B, Kiswandhi A, Graf D, Brooks J. S

Meeting Abstracts of the Physical Society of Japan, 68 936-936, 2013
Lebed-Osada Oscillation And Field-induced phase of HMTSF-TCNQ under pressure of 1 GPa

Fukumoto Y, Fujiwara H, Yoshino H, Sasaki T, Kato R, Murata K, Takaoka R, Yokogawa K, Kang W, Winter L, Shermane B, Kiswandhi A, Graf D, Brooks J.S

Meeting Abstracts of the Physical Society of Japan, 68 774-774, 2013
Nonlinear Conductivity under Hydrostatic Pressure and Uniaxial Strain in (TMTTF)_2Br

Yokogawa Keiichi, Takaoka Ryo, Hirayama Hikaru, Yoshino Harukazu, Nakamura Toshikazu, Brooks James, Sasaki Takahiko, Murata Keizo

Meeting Abstracts of the Physical Society of Japan, 68 775-775, 2013
B-4 物理実験からの科学教育 : 電子回路の実装より(研究発表(口頭発表))

横川敬一

日本理科教育学会近畿支部大会(大阪大会)発表要旨集, 2012 21-21, 2012
25aBK-5 Dirac Cone state in α-(BEDT-TTF)_2I_3 under 8 GPa

Masuda Kosuke, Yokogawa Keiichi, Konoike Takako, Yoshino Harukazu, Murata Keizo

Meeting Abstracts of the Physical Society of Japan, 67 888-888, 2012
27aBK-1 Field-induced phase of HMTSF-TCNQ under pressure of 1 GPa

Murata K, Yokogawa K, Yoshino H, Fujiwara H, Kato R, Masuda K, Kang W, Fukumoto Y, Graf D, Kiswandhi A, Choi E. S, Brooks J. S, Sasaki T

Meeting Abstracts of the Physical Society of Japan, 67, 2012
27aBK-2 Hall effect in field induced phase of HMTSF-TCNQ under pressure of 1 GPa

Masuda K, Fujiwara H, Kato R, Murata K, Kang W, Fukumoto Y, Graf D, Kiswandhi A, Choi E. S, Brooks J. S, Yokogawa K, Yoshino H

Meeting Abstracts of the Physical Society of Japan, 67 917-917, 2012
18aEB-6 Hall effect in field induced phase of HMTSF-TCNQ under pressure of 1 GPa

Kang W, Graf D, Kiswandhi A, Choi E. S, Brooks J. S

Meeting Abstracts of the Physical Society of Japan, 67 749-749, 2012
21aEB-11 Properties of Uniaxial Strain Medium STYCAST 1266 for Measurement of Transport Phenomena

Yokogawa Keiichi, Nuruzzaman Md, Yoshino Harukazu, Murata Keizo

Meeting Abstracts of the Physical Society of Japan, 67 802-802, 2012
21pFN-9 Experience of Science Experiment for High School Students under the Scheme of High-School-University Cooperation : Synthesis and Observation of Super-conductivity of YBa_2Cu_3O_<7-δ>

Yokogawa Keiichi, Murata Keizo

Meeting Abstracts of the Physical Society of Japan, 67 371-371, 2012