JUMP AND CREEP OF FLUX IN HIGH Tc OXIDE Tl4Ba3Ca3Cu4Oy BULK SUPERCONDUCTOR

JUMP AND CREEP OF FLUX IN HIGH Tc OXIDE Tl4Ba3Ca3Cu4Oy BULK SUPERCONDUCTOR

In the magnetization curve of Tl4Ba3Ca3Cu4Oy, bulk superconductor, there exists an anomaly of magnetization in the magnetic field lower than HCl. The time dependence of DC magnetization in zero-field-cooled sample has been investigated. The experimental result shows that there are giant flux creeps...

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Veröffentlicht in:中国科学：数学英文版 1990 (9), p.1082-1088
1. Verfasser: 曹效文 黄孙利 张凤英 龙香云 彭获田 彭秋云 齐志伟 吴裕生 方俊人 张伟杰 刘宏宝 毛向雷 张裕恒
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creep
flux
jump
superconductor
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creator 曹效文 黄孙利 张凤英 龙香云 彭获田 彭秋云 齐志伟 吴裕生 方俊人 张伟杰 刘宏宝 毛向雷 张裕恒
description In the magnetization curve of Tl4Ba3Ca3Cu4Oy, bulk superconductor, there exists an anomaly of magnetization in the magnetic field lower than HCl. The time dependence of DC magnetization in zero-field-cooled sample has been investigated. The experimental result shows that there are giant flux creeps and flux jumps during the flux creep. The magnetization decay rate depends upon both the field and the temperature. The thermal activation of flux lines for U0≈0.14 eV at 77.3 K is discussed.
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subjects creep
flux
jump
superconductor
title JUMP AND CREEP OF FLUX IN HIGH Tc OXIDE Tl4Ba3Ca3Cu4Oy BULK SUPERCONDUCTOR
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