Thermodynamic properties of the organic superconductor kappa(L)-(ET)(2)Ag(CF3)4 center dot TCE

被引：3

作者：

Wosnitza, J

Beckmann, D

Wanka, S

Schlueter, JA

Williams, JM

Naumann, D

Roy, T

机构：

[1] ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA

[2] ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA

[3] UNIV COLOGNE, INST ANORGAN CHEM, D-50939 COLOGNE, GERMANY

来源：

SOLID STATE COMMUNICATIONS | 1996年 / 98卷 / 01期

关键词：

organic crystals; superconductors; thermodynamic properties;

D O I：

10.1016/0038-1098(96)00027-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present specific-heat, magnetization, and ac-susceptibility measurements of the recently discovered organic superconductor kappa(L)-(ET)(2)Ag(CF3)(4) . TCE, where ET (=BEDT-TTF) stands for bisethylenedithio-tetrathiafulvalene and TCE is the neutral solvent 1,1,2-trichloroethane. We observed a very large anisotropy of the critical field B* extracted from ac-susceptibility data in accord with the enhanced ET-layer separation due to the large anions. The strong frequency dependence of B* reveals the weak pinning forces in the material. Magnetization and specific-heat, C, measurements prove the bulk effect of superconductivity. The linear coefficient of C is gamma approximate to 50 mJ/molK(2) which is a factor 9 larger than expected from a free-electron picture. Indications for strong coupling are found.

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页码：21 / 25

页数：5

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