ANISOTROPIC SUPERCONDUCTING PROPERTIES OF A TL-2223 SINGLE-CRYSTAL STUDIED BY TRANSPORT MEASUREMENTS

被引：13

作者：

HARDY, V

MAIGNAN, A

GOUPIL, C

PROVOST, J

SIMON, C

MARTIN, C

机构：

[1] CRISMAT, ISMRA, 14050, Boulevard du Marbhai Juin, Caen Cedex

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1994年 / 7卷 / 03期

关键词：

D O I：

10.1088/0953-2048/7/3/007

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We reported a resistive study of a Tl2Ba2Ca2Cu3O10-delta (Tl-2223) single crystal with magnetic fields up to 7 T applied in the two orientations H parallel-to c and H parallel-to ab. We obtained the anisotropic upper critical lines H(c2)(T) and the irreversibility lines H(irr)(T). The derivation of the coherence lengths leads to a rather small anisotropic ratio and exhibits a correlation between the coherence length along the c-axis and the thickness of the Cu-O layers. Different models of dissipation proposed in the literature have been unsuccessfully tested and, in particular, the occurrence of a 2D fluctuation mechanism was not observed in the studied part of the phase diagram.

引用

页码：126 / 132

页数：7

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