Effects of 230 MeV Au14+ irradiation on Bi2Sr2CaCu2Ox

被引：1
作者：
Kazumata, Y
Gao, XH
Kumakura, H
Togano, K
机构：
[1] ACAD SINICA,INST PLASMA PHYS,HEFEI 230031,ANHUI,PEOPLES R CHINA
[2] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN
来源：
SURFACE & COATINGS TECHNOLOGY | 1996年 / 84卷 / 1-3期
关键词：
high T-c superconductor; ion irradiation; critical current density; activation energy;
D O I：
10.1016/S0257-8972(95)02800-5
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Bi2Sr2CaCu2Ox tapes were irradiated with 230 MeV Au14+ and 120 MeV O7+ ions. Columnar defects and point-like defects were produced by the former and latter ions respectively. The increase in remanent magnetization due to Au14+ irradiation showed strong pinning effects caused by the columnar defects. The critical current density obtained from the hysteresis loops was enhanced, especially in high fields and at high temperatures. Irreversibility lines were also enhanced due to irradiation. The effective activation energy for vortex motion was obtained from the measurement of magnetization relaxation. The results of the columnar defects were compared with those of point defects caused by 120 MeV O7+ irradiation and also prior to irradiation. Magnetization relaxation experiments indicated that the introduction of columnar defects changed the vortex motion from two-dimensional to three-dimensional vortex creep.
引用
收藏
页码：348 / 352
页数：5
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