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
收藏
页码：271 / 278
页数：8
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