The irreversibility behavior of NdBaCuO fabricated by top-seeded melt processing

被引：40

作者：

Babu, NH ^{[1
]}

Lo, W ^{[1
]}

Cardwell, DA ^{[1
]}

Campbell, AM ^{[1
]}

机构：

[1] Univ Cambridge, IRC Superconduct, Cambridge CB3 0HE, England

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 19期

关键词：

D O I：

10.1063/1.125208

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large, single grain NdBa2Cu3O7-delta (Nd123)-Nd4Ba2Cu2O10 (Nd422) composites have been fabricated up to 2 cm in diameter in a controlled 1% O-2 in N-2 atmosphere using a top-seeded melt growth technique. The irreversibility field as a function of temperature has been obtained from magnetic hysteresis loops for magnetic fields applied parallel and perpendicular to the c axis of small specimens (approximate to 2 x 2 x 3 mm(3)) cut from individual grains. These specimens are observed to exhibit a pronounced peak effect for current flowing in the a-b plane and a five-fold anisotropy in the irreversibility line over a wide temperature range for fields applied along the major crystallographic axes. An exceptionally high irreversibility field (> 12 T at 89 K) is observed in this material for field applied perpendicular to the c axis, which extrapolates to well over 40 T at 77 K. (C) 1999 American Institute of Physics. [S0003-6951(99)00745-7].

引用

页码：2981 / 2983

页数：3

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