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Horigane, Kazumasa*; Kiho, Kunihiro*; Fujita, Kei*; Kajimoto, Ryoichi; Ikeuchi, Kazuhiko*; Ji, S.*; Akimitsu, Jun*; Lee, C. H.*
Scientific Reports (Internet), 6, p.33303_1 - 33303_6, 2016/09
Times Cited Count:14 Percentile:66.32(Multidisciplinary Sciences)Ito, Shinichi*; Yokoo, Tetsuya*; Masuda, Takatsugu*; Yoshizawa, Hideki*; Soda, Minoru*; Ikeda, Yoichi*; Ibuka, Soshi*; Kawana, Daichi*; Sato, Taku*; Nambu, Yusuke*; et al.
JPS Conference Proceedings (Internet), 8, p.034001_1 - 034001_6, 2015/09
Ishii, Kenji; Hoesch, M.*; Inami, Toshiya; Kuzushita, Kaori*; Owada, Kenji; Tsubota, Masami; Murakami, Yoichi; Mizuki, Junichiro; Endo, Yasuo; Tsutsui, Kenji*; et al.
Journal of Physics and Chemistry of Solids, 69(12), p.3118 - 3124, 2008/12
Times Cited Count:3 Percentile:18.13(Chemistry, Multidisciplinary)Kuroiwa, Sogo*; Sato, Koki*; Koda, Akihiro*; Kadono, Ryosuke*; Oishi, Kazuki*; Higemoto, Wataru; Akimitsu, Jun*
Journal of Physics and Chemistry of Solids, 68(11), p.2124 - 2128, 2007/11
Times Cited Count:3 Percentile:17.88(Chemistry, Multidisciplinary)The vortex state defined by two characteristic length scales, magnetic penetration depth () and coherence length (), in a layered hexagonal superconductor CaAlSi was probed using muon spin rotation. From preliminary analysis using modified London model, we found that the in-plane increases with increasing magnetic field while inter-plane is almost independent of magnetic field. The presence of field-induced quasiparticle excitation manifested in the field dependence of suggests that CaAlSi has an anisotropic gap structure.
Kadono, Ryosuke*; Kuroiwa, Sogo*; Akimitsu, Jun*; Koda, Akihiro*; Oishi, Kazuki; Higemoto, Wataru; Otani, Shigeki*
Physical Review B, 76(9), p.094501_1 - 094501_11, 2007/09
Times Cited Count:11 Percentile:47.11(Materials Science, Multidisciplinary)Kadono, Ryosuke*; Sato, Koki*; Koda, Akihiro*; Nagata, Takashi*; Furukawa, Hazuki*; Suzuki, Junichi; Matsuda, Masaaki; Oishi, Kazuki; Higemoto, Wataru; Kuroiwa, Sogo*; et al.
Physical Review B, 74(2), p.024513_1 - 024513_5, 2006/07
Times Cited Count:10 Percentile:44.47(Materials Science, Multidisciplinary)The response of vortex state to the magnetic field in NbSn is probed using muon spin rotation and small-angle neutron scattering. A transformation of vortex structure between hexagonal and squared lattice is observed over a relatively low field range of 2-3T. The gradual increase of the magnetic penetration depth with increasing field provides microscopic evidence for anisotropic (or multigapped) -wave pairing suggested by the Raman scattering experiment. This result renders need for careful examination on the difference of electronic properties between NbSn and VSi.
Kuroiwa, Sogo*; Takagiwa, Hiroyuki*; Yamazawa, Maki*; Tomita, Yoko*; Akimitsu, Jun*; Oishi, Kazuki; Koda, Akihiro*; Saha, S. R.*; Kadono, Ryosuke*; Higemoto, Wataru
Physica B; Condensed Matter, 374-375, p.251 - 254, 2006/03
Times Cited Count:1 Percentile:6.64(Physics, Condensed Matter)Magnetic field dependence of the effective penetration depth () determined by SR is reported for -Ca(AlSi), a structurally new phase of Ca(AlSi). The new phase has an AlB-type crystal structure with 3 symmetry which, in contrast to earlier reports, does not exhibit superlattice structure along the -axis. The bulk susceptibility measurement indicates that the upper critical field is much lower than that in superstructured ones for both - and -axis directions. A weak anisotropy in the superconducting order parameter is suggested from the increase of with increasing external field.
Kuroiwa, Sogo*; Zenitani, Yuji*; Yamazawa, Maki*; Tomita, Yoko*; Akimitsu, Jun*; Oishi, Kazuki; Koda, Akihiro*; Saha, S. R.*; Kadono, Ryosuke*; Watanabe, Isao*; et al.
Physica B; Condensed Matter, 374-375, p.75 - 78, 2006/03
Times Cited Count:1 Percentile:6.64(Physics, Condensed Matter)A comprehensive magnetic and superconducting phase diagram determined by muon spin rotation/relaxation (SR) is presented for CaNaCuOBr which has apical bromine atoms. Evidence for antiferromagnetic (AF) order in lightly doped samples and that for quasi-static spin glass (SG)-like state in moderately doped ones are obtained by ZF-SR at low temperatures. While the phase diagram is qualitatively similar to that in typical 2-1-4 cuprates including CaNaCuOCl and LaSrCuO, it exhibits a slight shift (expansion) over the axis.
Kuroiwa, Sogo*; Takagiwa, Hiroyuki*; Yamazawa, Maki*; Akimitsu, Jun*; Koda, Akihiro*; Kadono, Ryosuke*; Oishi, Kazuki; Higemoto, Wataru; Watanabe, Isao*
Science and Technology of Advanced Materials, 7(1), p.12 - 16, 2006/01
Times Cited Count:5 Percentile:22.34(Materials Science, Multidisciplinary)The temperature dependence of muon spin relaxation rate exhibits a significant increase below 130 K in CaB and 110 K in BaB, while no sigh of spontaneous muon precession signal under a zero field is observed. Moreover, the electric field gradient at the boron site measured by muon level-crossing resonance exhibits a step like change at 110 K in CaB. These results suggest a change in electronic state and the associated emergence of weak random magnetism below 110-130 K in these alkaline earth hexaborides.
Sasaki, Tomoyuki*; Yokoo, Tetsuya*; Katano, Susumu; Akimitsu, Jun*
Journal of the Physical Society of Japan, 74(1), p.267 - 270, 2005/01
Times Cited Count:2 Percentile:19.77(Physics, Multidisciplinary)no abstracts in English
Saito, Masahiro*; Okada, Noriko*; Nishibori, Eiji*; Takagiwa, Hiroyuki*; Yokoo, Tetsuya*; Nishi, Masakazu*; Kakurai, Kazuhisa; Kunii, Satoru*; Takata, Masaki*; Sakata, Makoto*; et al.
Journal of the Physical Society of Japan, 71(10), p.2369 - 2372, 2002/10
Times Cited Count:14 Percentile:60.62(Physics, Multidisciplinary)no abstracts in English
Katano, Susumu; *; Akimitsu, Jun*; Nishi, Masakazu*; Kakurai, Kazuhisa*
Physical Review Letters, 82(3), p.636 - 639, 1999/01
Times Cited Count:65 Percentile:88.72(Physics, Multidisciplinary)no abstracts in English
Nishi, Masakazu*; Kakurai, Kazuhisa*; Fujii, Yasuhiko*; Katano, Susumu; Akimitsu, Jun*; M.Yethiraj*; Fernandez-Baca, J. A.*
Journal of Physics and Chemistry of Solids, 60(8-9), p.1109 - 1111, 1999/00
Times Cited Count:5 Percentile:33.75(Chemistry, Multidisciplinary)no abstracts in English
*; *; *; Akimitsu, Jun*; Katano, Susumu; Nishi, Masakazu*; Kakurai, Kazuhisa*
Journal of Physics and Chemistry of Solids, 60(8-9), p.1039 - 1043, 1999/00
Times Cited Count:3 Percentile:23.12(Chemistry, Multidisciplinary)no abstracts in English
Nagata, Takashi*; *; Akimitsu, Jun*; Nishi, Masakazu*; Kakurai, Kazuhisa*; Katano, Susumu; *; *; Kobayashi, Norio*
Journal of the Physical Society of Japan, 68(7), p.2206 - 2209, 1999/00
Times Cited Count:33 Percentile:80.22(Physics, Multidisciplinary)no abstracts in English
Katano, Susumu; *; *; Akimitsu, Jun*; Nishi, Masakazu*; Kakurai, Kazuhisa*
Physica B; Condensed Matter, 259-261, p.1046 - 1047, 1999/00
Times Cited Count:10 Percentile:51.95(Physics, Condensed Matter)no abstracts in English
Katano, Susumu; *; Akimitsu, Jun*; Nishi, Masakazu*; Kakurai, Kazuhisa*; Fujii, Yasuhiko*
Physical Review B, 57(17), p.10280 - 10283, 1998/05
Times Cited Count:12 Percentile:55.73(Materials Science, Multidisciplinary)no abstracts in English
Nakamura, Akio; ; Nakada, Masami; Saeki, Masakatsu; *; Akimitsu, Jun*
Ceramic Transactions, 71, p.295 - 306, 1996/00
no abstracts in English
*; *; Yokoo, Tetsuya*; *; Akimitsu, Jun*; Katano, Susumu
Physica C, 263(1-4), p.344 - 348, 1996/00
Times Cited Count:1 Percentile:9.38(Physics, Applied)no abstracts in English
Katano, Susumu; *; Akimitsu, Jun*; Nishi, Masakazu*
Physical Review B, 52(21), p.15364 - 15367, 1995/12
Times Cited Count:25 Percentile:78.79(Materials Science, Multidisciplinary)no abstracts in English