INFLUENCE OF PROCESSING ON THE LOW-FIELD MAGNETIC PHASE-DIAGRAM OF HIGH-TEMPERATURE SUPERCONDUCTORS

被引：5

作者：

MEHDAOUI, A ^{[1
]}

BOLMONT, D ^{[1
]}

DANESI, P ^{[1
]}

BOURGAULT, D ^{[1
]}

LOEGEL, B ^{[1
]}

机构：

[1] CNRS,CTR RECH TRES BASSES TEMP,F-38042 GRENOBLE,FRANCE

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1993年 / 6卷 / 05期

关键词：

D O I：

10.1088/0953-2048/6/5/003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Low AC field magnetic phase diagrams in the (h(AC), T) plane have been deduced from AC susceptibility measurements for YBa2Cu3O7-delta sintered polycrystals, magnetically melt-textured polycrystals and single crystals. It is shown that dissipative regimes appear in all cases above a critical line located well below the irreversibility line, and the strongest shifts of the critical line against the irreversibility line are observed in magnetically melt-textured polycrystals. The relative positions of the irreversibility lines show that the increase of j(c) in magnetically melt-textured polycrystals is relevant to the creation of pinning sites with high activation energies.

引用

页码：322 / 326

页数：5

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