CRITICAL FIELD OF SINGLE CRYSTALLINE YBa2Cu3 O7 - delta

被引：0
|
作者：
Wijngaarden, Rinke J. [1 ]
Heeck, K. [1 ]
Griessen, R. [1 ]
Menovsky, A.A. [1 ]
Menken, M.J.V. [1 ]
机构：
[1] Univ Amsterdam, Amsterdam, Neth, Univ Amsterdam, Amsterdam, Neth
来源：
Physica C: Superconductivity and its Applications | 1988年 / 152卷 / 01期
关键词：
CERAMIC MATERIALS - CRYSTALLOGRAPHY - ULTRASONIC APPLICATIONS - YTTRIUM COMPOUNDS;
D O I：
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摘要：
Good electrical contacts with a surface resistance APP 1STH 10** minus **4 OMEGA cm**2 between gold wires and YBa//2Cu//3O//7// minus // delta single crystals were made with an ultrasonic wedge bonder. From resistivity measurements it is found that the dependence of T//c upon the magnetic field is highly anisotropic. With magnetic field B parallel c a dramatic broadening of the transition is observed. This is interpreted as being due to disorder in the crystallographic (a, b) plane. The measured critical fields, extrapolated to zero temperature using the Werthamer, Helfand and Hohenberg formalism, are given.
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页码：523 / 528
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