SUPPRESSION OF MAGNETIC GRANULARITY BY TRANSPORT CURRENT IN (BI,PB)(2)SR2CA2CU3OX TAPES

被引：48

作者：

PASHITSKI, AE

POLYANSKII, A

GUREVICH, A

PARRELL, JA

LARBALESTIER, DC

机构：

[1] Applied Superconductivity Center, University of Wisconsin, Madison

[2] Institute of Solid State Physics, RAS, Chernogolovka, Moscow District

来源：

APPLIED PHYSICS LETTERS | 1995年 / 67卷 / 18期

关键词：

D O I：

10.1063/1.114304

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using the magneto-optical technique, transport current flow in (Bi,Pb)(2)Sr2Ca2Cu3Ox (BSCCO) Ag-sheathed tapes has been imaged. For zero transport current, I, the magnetization currents display a pronounced macroscopic magnetic granularity (on a scale larger than the actual grain size) characterized by a percolative distribution of current loops. By applying I approximate to 0.8I(c) this granular behavior was largely replaced by a more uniform current flow. Due to the significant dependence of I-c on E in BSCCO, the extent to which the magnetic granularity is observed strongly depends on the magnetic prehistory and on the electric field E, whose characteristic values are very different for magnetization and transport measurements. (C) 1995 American Institute of Physics.

引用

页码：2720 / 2722

页数：3

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