SELF-FIELD EFFECT ON CRITICAL-CURRENT DENSITY IN SINGLE-CRYSTAL BI2SR2CACU2OX

被引：6

作者：

NAKAMURA, N

GU, GD

KOSHIZUKA, N

机构：

[1] Superconductivity Research Laboratory, International Superconductivity Technology Center, Koto-ku, Tokyo, 135

来源：

PHYSICA C | 1994年 / 225卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90326-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The critical current density J(c) in the a-b-plane of Bi2Sr2CaCu2Ox single crystals at 77 K has been measured for a range of angles theta between applied fields H(a) and the a-b-plane. J(c) is found to be a function of the perpendicular component H(a)perpendicular-to = H(a) sin theta only. The J(c)(H(a)perpendicular-to) curves showed a significant plateau in a low-field region, followed by a rapid drop with the increase of H(a). The critical state model of Kim et al., J(s) = alpha/(B + B0), has been modified by taking the self-field generated by the external current and demagnetization effect into account, and this modified model has described well the observed J(c) (H(a)perpendicular-to ) behavior. The implication for the roles of intrinsic pinning and extrinsic pinning on the determination of transport J(c) is discussed.

引用

页码：65 / 70

页数：6

共 22 条

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