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Journal Articles

$$^{195}$$Pt-NMR study on noncentrosymmetric heavy-fermion superconductor CePt$$_3$$Si

Yogi, Mamoru*; Kitaoka, Yoshio*; Hashimoto, Shin*; Yasuda, Takashi*; Settai, Rikio*; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Rogl, P.*; Bauer, E.*

Journal of Physics and Chemistry of Solids, 67(1-3), p.522 - 524, 2006/01

https://doi.org/10.1016/j.jpcs.2005.10.070
 Times Cited Count：9 Percentile：40.57(Chemistry, Multidisciplinary)

We report on magnetic and novel superconducting properties in heavy-fermion (HF) noncentrosymmetric compound CePt$$_3$$Si via the measurement of $$^{195}$$Pt nuclear spin-lattice relaxation rate 1/$$T$$$$_1$$. This compound reveals the uniform coexistence of antiferromagnetism ($$T_{rm N}$$ =2.2 K) and superconductivity ($$T_{rm c}$$ =0.75 K). CePt$$_3$$Si is the first HF superconductor that reveals a peak in 1/$$T$$$$_1$$ just below $$T_{rm c}$$ and, additionally, does not follow the $$T^3$$ law that was observed for most unconventional HF superconductors. The novel relaxation behavior found below $$T_{rm c}$$ may be relevant with a possible novel SC state being realized in the noncentrosymmetric CePt$$_3$$Si.

Journal Articles

$$^{115}$$In-NQR study of antiferromagnetism and superconductivity in CeRhIn$$_5$$ and CeIn$$_3$$ under pressure

Kawasaki, Shinji*; Yashima, Mitsuharu*; Kotegawa, Yu*; Mito, Takeshi*; Kawasaki, Yu*; Zheng, G.-Q.*; Kitaoka, Yoshio*; Shishido, Hiroaki*; Araki, Shingo*; Aoki, Dai*; et al.

Journal of Physics and Chemistry of Solids, 67(1-3), p.497 - 499, 2006/01

https://doi.org/10.1016/j.jpcs.2005.10.043
 Times Cited Count：2 Percentile：13.40(Chemistry, Multidisciplinary)

We report the novel phase diagram of superconductivity (SC) and antiferromagnetism (AFM) in heavy-fermion (HF) pressure ($$P$$)-induced superconductors CeRhIn$$_5$$ and CeIn$$_3$$ through nuclear-quadrupole-resonance (NQR) measurements under $$P$$. The $$P$$-induced superconductivity in CeRhIn$$_5$$ coexists with AFM on a microscopic level in 1.5-1.9 GPa. By contrast, in CeIn$$_3$$, the $$P$$-induced phase separation of AFM and paramagnetism (PM) takes place without any trace of a quantum phase transition. The outstanding finding is that SC sets in at both the phasesmagnetically separated into AFM and PM in 2.28-2.5 GPa.

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