Phase transition in a complex superconductor of BEDT-TTF series by nonlinear susceptibility

被引：2
|
作者：
Matsuura, M [1 ]
Miyoshi, K [1 ]
Kuwagaki, T [1 ]
Hirose, M [1 ]
Hagiwara, M [1 ]
Saito, G [1 ]
机构：
[1] KYOTO UNIV,FAC SCI,DEPT CHEM,KYOTO 606,JAPAN
来源：
PHYSICA B | 1997年 / 237卷
关键词：
phase transition; nonlinear susceptibility; organic superconductor; superconductivity;
D O I：
10.1016/S0921-4526(97)00092-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Nonlinear magnetic response to an AC excitation held are examined for kappa-(BEDT-TTF)(2)Cu(NCS)(2) at zero external DC held. Temperature dependence of M-3 omega', the third-harmonic in-phase component, depends strongly on field amplitude h and also on sample preparation. At a weak field amplitude of h < 0.1 Oe, however, it shows a common positive peak around 9 K, indicating a negative divergence of nonlinear susceptibility chi(2) at the superconductive transition temperature T-c.
引用
收藏
页码：186 / 187
页数：2
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