J. Phys. Soc. Jpn. 75S (2006) pp. 170-173  |Previous Article| |Next Article|  |Table of Contents|
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Proc. of 5th Int. Symposium on ASR-WYP-2005 – Advances in the Physics and Chemistry of Actinide Compounds –

Magnetism and Superconductivity in CePt₃Si Under Pressure

Tetsuya Takeuchi^1,2, Masato Shiimoto³, Hisanori Kohara³, Takashi Yasuda³, Shin Hashimoto³, Rikio Settai³ and Yoshichika Ōnuki^3,4

Magnetism and superconductivity in the heavy fermion superconductor CePt₃Si have been studied under pressure. The antiferromagnetic transition and superconducting transition temperatures, T_N and T_SC, respectively, decrease by applying pressure. T_N becomes zero around 0.6–0.7 GPa, while the pressure dependence of T_SC exhibits a shoulder-like feature around 0.7 GPa, and superconductivity is found to persist in the pressure range up to about 1.5 GPa. A broad peak around 5 K in the temperature derivative of thermal expansion α(T) and electrical resistivity dρ(T)/dT at ambient pressure begins to shift to higher temperatures above 0.7 GPa. These results suggest that a critical pressure exists around 0.6–0.7 GPa in CePt₃Si.

URL: http://jpsj.ipap.jp/link?JPSJS/75S/170/
DOI: 10.1143/JPSJS.75S.170
KEYWORDS:magnetism, superconductivity, CePt₃Si, pressure

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