Flux pinning in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy melt-processed, superconductors

被引：73

作者：

Koblischka, MR ^{[1
]}

Muralidhar, M ^{[1
]}

Murakami, M ^{[1
]}

机构：

[1] Int Superconduct Technol Ctr, Superconduct Res Lab, Minato Ku, Tokyo 105, Japan

来源：

APPLIED PHYSICS LETTERS | 1998年 / 73卷 / 16期

关键词：

D O I：

10.1063/1.122458

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The flux pinning characteristics of ternary melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG) superconductors are studied in the temperature range 60 less than or equal to T less than or equal to 90 K. NEG samples exhibit a strongly developed peak effect in the dependence of the critical current densities on the external field, H-a. The scaling of the pinning forces versus the reduced field h = H-a /H-irr (where H-irr denotes the irreversibility field) yields a peak at h(0) = 0.5 which is an indication of pinning provided by a spatial variation of the transition temperature. The presence of a weaker superconducting second phase is demonstrated by means of field cooling and warming experiments in fields up to 7 T. Furthermore, we discuss the possible effect of the magnetic moments of Gd and Nd on the flux pinning. (C) 1998 American Institute of Physics. [S0003-6951(98)01742].

引用

页码：2351 / 2353

页数：3

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