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arXiv · 0709.0834

AC/DC Susceptibility of the Heavy-Fermion Superconductor CePt3Si under Pressure

Yoshihiro Aoki·Akihiko Sumiyama·Gaku Motoyama·Yasukage Oda·Yasuda Settai·Yoshichika Onuki
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Abstract

We have investigated the pressure dependence of ac and dc susceptibilities of the heavy-fermion superconductor CePt3Si (Tc= 0.75 K) that coexists with antiferromagnetism (TN = 2.2 K). As hydrostatic pressure is increased, Tc first decreases rapidly, then rather slowly near the critical pressure Pc = 0.6 GPa and shows a stronger decrease again at higher pressures, where Pc is the pressure at which TN becomes zero. A transition width and a difference in the two transition temperatures defined in the form of structures in the out-of-phase component of ac susceptibilities also become small near Pc, indicating that a double transition observed in CePt3Si is caused by some inhomogeneous property in the sample that leads to a spatial variation of local pressure. A sudden increase in the Meissner fraction above Pc suggests the influence of antiferromagnetism on superconductivity.

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Yoshihiro Aoki, Akihiko Sumiyama, Gaku Motoyama, Yasukage Oda, Yasuda Settai, Yoshichika Onuki. 2007-09-06. AC/DC Susceptibility of the Heavy-Fermion Superconductor CePt3Si under Pressure. https://doi.org/10.1143/jpsj.76.114708

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