Composition-controlled melt processing of Nd1+xBa2-xCu3O7-δ-based bulk material in air

被引：9
|
作者：
Schätzle, P [1 ]
Ebbing, G [1 ]
Bieger, W [1 ]
Krabbes, G [1 ]
机构：
[1] Inst Solid State & Mat Res Dresden, D-01171 Dresden, Germany
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2000年 / 330卷 / 1-2期
关键词：
phase diagram; substitution effects; magnetic susceptibility; critical current density; peak effect;
D O I：
10.1016/S0921-4534(99)00591-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Nd(1+x)Ba(2-x)Cu(3)O(7-delta) (Nd-123) superconductors were melt-processed in air atmosphere starting from an initial precursor consisting of Nd(2)O(3), BaCuO(2) and CuO, or Nd-123 and BaCuO(2), respectively, to stabilise the process to proceed in equilibrium with compositions along the tie line Nd-123-Nd-422, both with its stoichiometric compositions. The Nd:Ba ratio was stabilised close to 1:2 and high T(c) values up to 96 K were achieved. As a result, J(c) values of 30 kA/cm(2) (0 T) and an expressed peak effect of 10 kA/cm(2) arises at an applied external magnetic field of 2 T at 77 K. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：19 / 26
页数：8
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