ULTRASONIC-ATTENUATION IN HIGH-TC SUPERCONDUCTORS - A NEW APPROACH TO THE PROBLEM OF GLUX PINNING

被引：11

作者：

LEMMENS, P ^{[1
]}

FRONING, P ^{[1
]}

EWERT, S ^{[1
]}

PANKERT, J ^{[1
]}

PASSING, H ^{[1
]}

COMBERG, A ^{[1
]}

机构：

[1] PHILIPS GMBH,FORSCHUNGSLAB,W-5100 AACHEN,GERMANY

来源：

PHYSICA B | 1990年 / 165卷

关键词：

D O I：

10.1016/S0921-4526(09)80223-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Measurements of the transverse sound attenuation and velocity in ceramic YBa2Cu3Ox superconductors were performed with and without a magnetic field. We observe a pronounced peak in the field-induced attenuation and an increase of the velocity at low temperatures. We attribute these effects to the transition of a rigidly pinned flux line lattice into a depinned state at higher temperatures and give a quantitative explanation in terms of thermally assisted flux flow. Depinning temperatures show a drastic dependence on the oxygen stoichiometry. © 1990, Elsevier Science Publishers B.V. (North-Holland). All rights reserved.

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页码：1275 / 1276

页数：2

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