Sr2Mn2O5 magnetic structure

被引：29

作者：

Caignaert, V

机构：

[1] Laboratoire CRISMAT-ISMRA, 14050 Caen Cedex, Bd Mardchal Juin

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1997年 / 166卷 / 1-2期

关键词：

perovskite; magnetic structure; neutron diffraction;

D O I：

10.1016/S0304-8853(96)00455-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nuclear and magnetic structures of the oxygen deficient perovskite Sr2Mn2O5 have been investigated by neutron powder diffraction. This compound crystallizes in orthorhombic space group Pbam with a approximate to root 2a(p), b approximate to 2 root 2a(p) and c approximate to a(p) (with a(p) approximate to 3.84 Angstrom), and exhibits antiferromagnetic order below 380 K. The resolution of the magnetic structure at room temperature and 4.2 K shows that the Mn+3 ions (d(4)) order with a propagation vector k = (0,0,1/2) and a magnetic moment of 3.2 mu(B), at 4.2 K. Each manganese is in square pyramidal coordination, and is coupled antiferromagnetically with three neighbours and ferromagnetically with two others.

引用

页码：117 / 123

页数：7

共 19 条

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