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.
引用
收藏
页码：21 / 25
页数：5
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