MAGNETOSTRICTION OF SEVERAL HIGH-TC SUPERCONDUCTORS

被引：14

作者：

BRADEN, M ^{[1
]}

BOHM, P ^{[1
]}

SEIDLER, F ^{[1
]}

KALENBORN, H ^{[1
]}

WOHLLEBEN, D ^{[1
]}

机构：

[1] UNIV COLOGNE, INST PHYS 2, W-5000 COLOGNE 41, GERMANY

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1990年 / 79卷 / 02期

关键词：

D O I：

10.1007/BF01406580

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on magnetostriction measurements of superconducting and nonsuperconducting YBa2Cu3O7-δ and of two Bi samples with the nominal compositions Bi2CaSr2Cu2Ox and Bi0.8Pb0.2Sr0.8CaCu1.5Ox. Both types of high temperature superconductors show a nearly identical strongly hysteretic field dependence of the magnetostriction (MS) (Δl/l∼+(2-6)*10-6 at 5 T and 1.5 K). In both cases the MS is a linear function of field in the region 1-5 T, which we explain by striction due to surface currents. Between 1.5 and 35 K the hysteresis of the MS decreases strongly with increasing temperature, which implies a decrease of the pinning force. The MS of quenched nonsuperconducting YBa2Cu3O7-δ is at least two orders of magnitude smaller than that of the superconductor. © 1990 Springer-Verlag.

引用

页码：173 / 176

页数：4

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