FLUX JUMPS, CRITICAL FIELDS, AND DEHAAS-VANALPHEN EFFECT IN K-(BEDT-TTF)2CU(NCS)2

被引：42

作者：

SWANSON, AG ^{[1
]}

BROOKS, JS ^{[1
]}

ANZAI, H ^{[1
]}

KONOSHITA, N ^{[1
]}

TOKUMOTO, M ^{[1
]}

MURATA, K ^{[1
]}

机构：

[1] ELECTROTECH LAB,TSUKUBA,IBARAKI 305,JAPAN

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 73卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0038-1098(90)90437-G

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

DC magnetization measurements of κ-(BEDT-TTF)2Cu(NCS)2 in the superconducting state show unusual flux jump phenomena. The analysis of the effect yields a pinning force density of ∼ 1.5 × 1012 N/m3, an order of magnitude larger than that of the high temperature superconductor YBaCuO. The magnetization measurements confirm the anisotropy of the upper critical fields and show no evidence of flux flow and fluctuation effects for κ-(BEDT-TTF)2Cu(NCS)2. The de Haas-van Alphen Oscillations yield a frequency of 622 tesla and a beat frequency of ∼ 30 tesla. This is the first evidence of a beat frequency for this compound, indicating warping of the 2-dimensional Fermi surface in the z direction. © 1990.

引用

页码：353 / 356

页数：4

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