HC1 ANOMALIES IN HIGH-TC SUPERCONDUCTORS - AN INVESTIGATION IN THE OFF-STOICHIOMETRIC YBA2CU3O7-DELTA

被引：10

作者：

KHODER, AF

COUACH, M

MONNIER, F

HENRY, JY

机构：

[1] Centre d’Etudes Nucléaires de Grenoble, Département de Recherche Fondamentale, Grenoble Cedex, 38041

来源：

EUROPHYSICS LETTERS | 1991年 / 15卷 / 03期

关键词：

D O I：

10.1209/0295-5075/15/3/018

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We determined the temperature dependence of H(c1) in high-T(c) superconductors by investigating the reversible regime and measuring the differential susceptibility chi'H of the mixed state. This technique is free from all the factors inducing uncertainties in the determination of H(c1) by magnetization measurements. The results clearly show the anomalous behaviour of H(c1)(T) far from T(c), for the YBa2Cu3O7-delta system with delta > 0.3, a stoichiometry necessary to extend the eversibility domain below the temperature of the H(c1) anomaly considering that our d.c. field is limited to 2 T.

引用

页码：337 / 342

页数：6

共 25 条

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