Synthesis and stoichiometry of MgB2

被引：84

作者：

Hinks, DG ^{[1
]}

Jorgensen, JD ^{[1
]}

Zheng, H ^{[1
]}

Short, S ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2002年 / 382卷 / 2-3期

关键词：

MgB2; stoichiometry; synthesis;

D O I：

10.1016/S0921-4534(02)01842-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The system MgxB2 has been studied to investigate possible nonstoichiometry in MgB2. When synthesized at 850 degreesC, MgB2 is a line compound with a possible Mg vacancy content of about 1%. Small changes in lattice constants as a function of starting composition result from grain-interaction stresses, whose character is different in the Mg-rich, near-stoichiometric, and Mg-deficient regimes. A small linear decrease of the superconducting transition temperature, T-c, in the Mg-rich regime results from accidental impurity doping. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：166 / 176

页数：11

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