A neutron powder diffraction study of the crystal and magnetic structure of Fe0.72Mn1.28As at 295 and 10 K

被引：8

作者：

Baron, V ^{[1
]}

Neronin, M ^{[1
]}

Rundlof, H ^{[1
]}

Tellgren, R ^{[1
]}

机构：

[1] UNIV UPPSALA,INST CHEM,S-75121 UPPSALA,SWEDEN

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1997年 / 169卷 / 03期

关键词：

magnetic structure; neutron powder diffraction; Mn2As; Fe2As; Fe2-xMnxAs;

D O I：

10.1016/S0304-8853(96)00752-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The basic building block for Fe2-xMnxAs is a rhombohedral TT'As subcell where one of the metals, T-I, occupies a tetrahedral site and the other, T-II, a pyramidal site. The present neutron powder diffraction experiments performed at 523, 295, and 10 K have been undertaken to study the first-order ferrimagnetic-antiferromagnetic transition of Fe0.72Mn1.28As. The nuclear structure of Fe0.72Mn1.28As at 523, 295 and 10 K and the magnetic structure at 295 and 10 K have been studied by means of Rietveld refinements. These show that Fe atoms preferentially occupy site I (69%) and Mn atoms site II (97%). The magnetic moment of site II (3.17(5) mu(B) at 295 K) is larger than the moment of site I (1.01(2) mu(B) at 295 K). At 10 K we have observed the appearance of a magnetic moment in the c-direction.

引用

页码：271 / 278

页数：8

共 37 条

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