Temperature dependence of the structural parameters of the non-oxide perovskite superconductor MgCNi3

被引：28

作者：

Huang, Q ^{[1
]}

He, T

Regan, KA

Rogado, N

Hayward, M

Haas, MK

Inumaru, K

Cava, RJ

机构：

[1] Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[4] Princeton Univ, Princeton Mat Inst, Princeton, NJ 08544 USA

来源：

PHYSICA C | 2001年 / 363卷 / 04期

基金：

美国国家科学基金会;

关键词：

no-oxide perovskite; structure parameters; neutron powder diffraction;

D O I：

10.1016/S0921-4534(01)01068-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the structural parameters of superconducting MgCxNi3 (x = 0.96, T-c = 7.3 K) as a function of temperature, from 2 to 295 K, determined by neutron powder diffraction profile refinement. The compound has the perovskite structure over the whole temperature range, with symmetry Pm (3) over barm and a = 3.81221(5) Angstrom at 295 K: no structural or long range magnetic ordering transitions were observed. The lattice parameter a and tho Debye-Waller factors for the individual atoms decrease smoothly with decreasing temperature. There are no unusual changes of the structural parameters near T-c. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：215 / 218

页数：4

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