TEMPERATURE-DEPENDENCE OF THE MAGNETIC-FIELD PENETRATION DEPTH IN YBA2CU3O7-DELTA-MEASURED ON ULTRA FINE POWDER

被引：28

作者：

GANTMAKHER, VF

GOLOVKO, NI

NAUMENKO, IG

NEMINSKY, AM

PETINOVA, AV

机构：

[1] Institute of Solid State Physics, Academy of Sciences of the USSR, Chernogolovka, Moscow District

来源：

PHYSICA C | 1990年 / 171卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(90)90134-Z

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temperature dependence of the magnetic field penetration depth λ(T) in superconducting YBa2Cu3O7-δ has been determined by measuring the AC susceptibility of fine powder at the frequency 105 Hz. The reason for noticeable changes in λ at low temperatures has been found out: strong scattering of carriers by low-frequency excitations. The coupling constant which controls the superconductivity has been estimated. At low temperatures a paramagnetic signal superimposed to the superconductivity one has been observed. It is probably due to alteration in the interaction of the magnetic moments near the surface of the particles. © 1990.

引用

页码：223 / 230

页数：8

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