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Si investigated by ac calorimetryTateiwa, Naoyuki; Haga, Yoshinori; Matsuda, Tatsuma; Ikeda, Shugo; Yasuda, Takashi*; Takeuchi, Tetsuya*; Settai, Rikio*; Onuki, Yoshichika
Journal of the Physical Society of Japan, 74(7), p.1903 - 1906, 2005/07
Times Cited Count：71 Percentile：89.01(Physics, Multidisciplinary)The pressure dependences of the antiferromagnetic and superconducting transition temperatures have been investigated by ac heat capacity measurement under high pressures for the heavy-fermion superconductor CePt
Si without inversion symmetry in the tetragonal structure. The N
el temperature 
= 2.2 K decreases with increasing pressure and becomes zero at the critical pressure 
0.6 GPa. On the other hand, the superconducting phase exists in a wider pressure region from ambient pressure to about 1.5 GPa. The pressure phase diagram of CePtSi is thus very unique and has never been reported before for other heavy fermion superconductors.
Haga, Yoshinori; Inada, Yoshihiko*; Harima, Hisatomo*; Oikawa, Kenichi*; Murakawa, Masao*; Nakawaki, Hirokazu*; Tokiwa, Yoshifumi; Aoki, Dai*; Shishido, Hiroaki*; Ikeda, Shugo*; et al.
Physical Review B, 63(6), p.060503_1 - 060503_4, 2001/02
Times Cited Count：145 Percentile：97.42(Materials Science, Multidisciplinary)We observed the de Haas-van Alphen oscillation in the heavy fermion compound CeIrIn5. The topology of the Fermi surface is found to be neary cylindrical, reflecting the unique tetragonal structure. Observed branches are well explained by the 4f-itinerant band model. The cyclotron masses are large, 20-30 m0, which are one order larger than the corresponding band masses.
Koike, Yoshihiro*; Metoki, Naoto; Kimura, Noriaki*; Yamamoto, Etsuji; Haga, Yoshinori; Onuki, Yoshichika*; *
Journal of the Physical Society of Japan, 67(4), p.1142 - 1145, 1998/04
Times Cited Count：24 Percentile：85.82(Physics, Multidisciplinary)no abstracts in English
