Finger patterns of magnetic flux in bulk Bi2Sr2CaCu2O8+delta samples

Barness  D; Sinvani  M; Shaulov  ATamegai  TYeshurun  Y

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Finger patterns of magnetic flux in bulk Bi2Sr2CaCu2O8+delta samples

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摘要

Fingerlike flux patterns, normally observed in superconducting films, are demonstrated in a bulk material. We observed such patterns in Bi2Sr2CaCu2O8+delta crystals with an artificial barrier separating regions of different magnetic diffusivity, created by irradiating one-half of the crystal with heavy ions. Flux penetration from the nonirradiated part of the crystal, through the barrier, into the irradiated part forms fingerlike patterns in a wide range of temperatures and field ramping rates. The mechanism responsible for the observed patterns is discussed.

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《Physical review, B. Condensed matter and materials physics》 |2008年第9期|094514-1-094514-5-0|共5页
作者
Barness D; Sinvani M; Shaulov ATamegai TYeshurun Y;
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作者单位

Bar Ilan Univ, Dept Phys, Inst Superconduct, IL-52900 Ramat Gan, Israel;

Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan;

hc.chalmers.se;

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正文语种英语
中图分类固体物理学;
关键词
TRANSIENT VORTEX STATES; ANISOTROPIC SUPERCONDUCTORS; II SUPERCONDUCTORS; MGB2 FILMS; INSTABILITY; GROWTH; PENETRATION; CRYSTALS;

Finger patterns of magnetic flux in bulk Bi2Sr2CaCu2O8+delta samples

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