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Noma, Yuichiro*; Kotegawa, Hisashi*; Kubo, Tetsuro*; To, Hideki*; Harima, Hisatomo*; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*; Ito, Kohei*; Nakamura, Ai*; et al.
Journal of the Physical Society of Japan, 90(7), p.073707_1 - 073707_5, 2021/07
Times Cited Count：0 Percentile：0(Physics, Multidisciplinary)
; 
Pt-NMR studyAoyama, Taisuke*; Kotegawa, Hisashi*; Kimura, Noriaki*; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika*; To, Hideki*
Journal of the Physical Society of Japan, 88(6), p.064706_1 - 064706_7, 2019/06
Times Cited Count：0 Percentile：0(Physics, Multidisciplinary); 
Ge-NQR study at ambient pressureNoma, Yuichiro*; Kotegawa, Hisashi*; Kubo, Tetsuro*; To, Hideki*; Harima, Hisatomo*; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*; Ito, Kohei*; Haller, E. E.*; et al.
Journal of the Physical Society of Japan, 87(3), p.033704_1 - 033704_5, 2018/03
Times Cited Count：4 Percentile：47.76(Physics, Multidisciplinary)
Co NMRKotegawa, Hisashi*; Nohara, Hiroki*; To, Hideki*; Matsuda, Tatsuma; Yamamoto, Etsuji; Haga, Yoshinori; Fisk, Z.; Onuki, Yoshichika; Aoki, Dai*; Flouquet, J.*
Journal of the Korean Physical Society, 63(3), p.341 - 344, 2013/08
Times Cited Count：1 Percentile：12.72(Physics, Multidisciplinary)Aoki, Dai*; Taupin, M.*; Paulsen, C.*; Hardy, F.*; Taufour, V.*; Kotegawa, Hisashi*; Hassinger, E.*; Malone, L.*; Matsuda, Tatsuma; Miyake, Atsushi*; et al.
Journal of the Physical Society of Japan, 81(Suppl.B), p.SB002_1 - SB002_6, 2012/12
Times Cited Count：3 Percentile：28.92(Physics, Multidisciplinary)Aoki, Dai*; Combier, T.*; Taufour, V.*; Matsuda, Tatsuma; Knebel, G.*; Kotegawa, Hisashi*; Flouquet, J.*
Journal of the Physical Society of Japan, 80(9), p.094711_1 - 094711_10, 2011/09
Times Cited Count：71 Percentile：92.29(Physics, Multidisciplinary)Co-NMR studyNohara, Hiroki*; Kotegawa, Hisashi*; To, Hideki*; Matsuda, Tatsuma; Yamamoto, Etsuji; Haga, Yoshinori; Fisk, Z.; Onuki, Yoshichika; Aoki, Dai*; Flouquet, J.*
Journal of the Physical Society of Japan, 80(9), p.093707_1 - 093707_4, 2011/09
Times Cited Count：17 Percentile：70.46(Physics, Multidisciplinary)
Be-NMR spin-lattice relaxation rate in heavy-fermion superconductor UBe
Morita, Kyohei*; Hara, Yudai*; Sakano, Junya*; Kotegawa, Hisashi*; To, Hideki*; Haga, Yoshinori; Onuki, Yoshichika
Journal of the Physical Society of Japan, 80(Suppl.A), p.SA099_1 - SA099_3, 2011/07
Times Cited Count：1 Percentile：12.07(Physics, Multidisciplinary)Ca
Cu
O
superconductorTokiwa, Kazuyasu*; Mikusu, Satoshi*; Higemoto, Wataru; Nishiyama, Kusuo*; Iyo, Akira*; Tanaka, Yasumoto*; Kotegawa, Hisashi*; Mukuda, Hidekazu*; Kitaoka, Yoshio*; Watanabe, Tsuneo*
Physica C, 460-462(2), p.892 - 895, 2007/09
Times Cited Count：3 Percentile：18.97(Physics, Applied)Zero- and longitudinal-field muon-spin rotation (ZF-
SR and LF-SR) measurements were carried out on a multi-layered HgBaCaCuO (Hg-1245) superconductor with 
of 108 K. With decreasing temperature, the observed ZF-SR function changed from a Gaussian-type to an exponential-type below 60 K and zero field muon precession was also observed below 45 K. These SR signals are attributed to the development of the antiferromagnetic ordering in inner CuOplanes with a low carrier concentration. These results seem to indicate clear evidence that antiferromagnetism microscopically coexists with superconductivity in the Hg-1245 superconductor below 60 K.
Yamamoto, Etsuji; Haga, Yoshinori; Ikeda, Shugo; Matsuda, Tatsuma; Akazawa, Teruhiko*; Kotegawa, Hisashi*; Kobayashi, Tatsuo*; Onuki, Yoshichika*
Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.e123 - e125, 2007/03
no abstracts in English
; A Ge-NQR study under pressureHarada, Atsuyuki*; Kawasaki, Shinji*; Kotegawa, Hisashi*; Kitaoka, Yoshio*; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika; Ito, Kohei*; Haller, E. E.*; Harima, Hisatomo*
Journal of the Physical Society of Japan, 74(10), p.2675 - 2678, 2005/10
Times Cited Count：20 Percentile：69.81(Physics, Multidisciplinary)no abstracts in English
Matsuda, Tatsuma; Aoki, Dai*; Kotegawa, Hisashi*; Hassinger, E.*; Taufour, V.*; Knebel, G.*; Braithwaite, D.*; Salce, B.*; Yamamoto, Etsuji; Haga, Yoshinori; et al.
no journal, ,
no abstracts in English
Sakai, Hironori; Tokunaga, Yo; Haga, Yoshinori; Kambe, Shinsaku; Zhu, J.-X.*; Ronning, F.*; Ramakrishna, S. K.*; Reyes, A. P.*; Kotegawa, Hisashi*; To, Hideki*; et al.
no journal, ,
In heavy fermion superconductor CeCoIn, slight Zn substitutions for In atoms induce antiferromagnetism, while slight Ni substitutions for Co atoms suppress superconductivity. The both substituted CeCoIn exhibit non- fermi-liquid behaviors near the phase boundaries which have been detected by magnetization and specific heat measurements. We have performed NMR experiments in these systems to investigate the microscopic effects by substituents. We will discuss about the spin fluctuations near the boundaries by NMR relaxation rates.
Sakai, Hironori; Tokunaga, Yo; Haga, Yoshinori; Kambe, Shinsaku; Zhu, J.-X.*; Ronning, F.*; Kotegawa, Hisashi*; To, Hideki*; Suzuki, Kohei*; Oshima, Yoshiki*; et al.
no journal, ,
The Ni-substitutions of Co in the heavy fermion superconductor CeCoIn are reported to suppress the superconductivity by Yokoyama et al. in Ibaraki Univ. To microscopically investigate the Ni doping effect, we have performed NMR study in the alloy system of Ce(Co, Ni)In. We would like to discuss the spin fluctuations and the electronic state near the critical composition for the superconductivity in this system.
Sakai, Hironori; Tokunaga, Yo; Haga, Yoshinori; Kambe, Shinsaku; Ronning, F.*; Zhu, J.-X.*; Thompson, J. D.*; Kotegawa, Hisashi*; To, Hideki*; Suzuki, Kohei*; et al.
no journal, ,
Heavy fermion superconductor CeCoIn is considered as a quantum critical antiferromagnetic material. When the In elements are slightly substituted by Zn elements, a long-range antiferromagnetism is induced. On the other hand, slight Sn substitutions make the system step away from the quantum critical point. In the case of Zn substitutions, heterogeneity of antiferromagnetic area in the matrix of heavy fermion state has been microscopically confirmed by NQR measurements. In the case of Ni substitutions for the Co elements, the NQR result appears to be the same as in Sn substituted system.
