EFFECTS OF 230 MEV AU-14 IRRADIATION ON BI2SR2CACU2OX

被引：4

作者：

GAO, XH

KAZUMATA, Y

KUMAKURA, H

TOGANO, K

机构：

[1] JAPAN ATOM ENERGY RES INST,TOKAI,IBARAKI 31911,JAPAN

[2] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICA C | 1995年 / 250卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(95)00349-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bi2Sr2CaCu2Ox tapes were irradiated using 230 MeV Au14+ ions. Columnar defects were presumably produced due to irradiation. Zero-field-cooling (ZFC) magnetization increased up to a fluence of 1.6 X 10(11) Au+/cm(2), but field-cooling (FC) magnetization decreased, indicating the strong pinning effects resulting from the columnar defects. The critical current density as well as the irreversibility field, obtained from the hysteresis loops, were enhanced. Irreversibility fields are fitted by H-irr = A exp(-T/T-A). An effective activation energy for flux motion was obtained from the measurements of magnetization relaxation. The features of flux pinning as a result of the columnar defects were compared with those of point defects brought about by 120 MeV O7+ irradiation.

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页码：325 / 330

页数：6

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