CHI''-PEAKS, FLUX-PINNING, AND THE IRREVERSIBILITY LINE IN HIGH-TEMPERATURE SUPERCONDUCTORS

被引：12
|
作者：
FLIPPEN, RB
ASKEW, TR
FENDRICH, JA
VLCEK, BM
机构：
[1] KALAMAZOO COLL,KALAMAZOO,MI 49007
[2] ARGONNE NATL LAB,ARGONNE,IL 60439
来源：
PHYSICA C | 1994年 / 228卷 / 1-2期
关键词：
D O I：
10.1016/0921-4534(94)90177-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Physical processes that produce various peaks in the adsorption component chi'' of the AC susceptibility of high-temperature superconductors are described. It is shown that for good YBa2Cu3O7-x crystals twinning planes are the main source of flux pinning and the primary determinant of the reported irreversibility line (IL) position in the H-T plane. In other situations, particularly ones involving weaker pinning, the apparent IL is found to lie much lower in the H-T plane. Ambiguous results from experiments designed to produce pinning sites by irradiation are discussed in the context to this new observation.
引用
收藏
页码：85 / 90
页数：6
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