Anomalous spin state of Fe in double perovskite oxide Sr2FeWO6

被引：13

作者：

Kawanaka, H

Hase, I

Toyama, S

Nishihara, Y

机构：

[1] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

[2] Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan

来源：

PHYSICA B | 2000年 / 284卷 / 284期

关键词：

double perovskite oxides; Mossbauer spectroscopy; spin state; Sr2FeWO6;

D O I：

10.1016/S0921-4526(99)02640-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In the series of Sr2FeTO6 (T = 4d or 5d, the valence of Fe is 3 + in most of the compounds. However, recently we have found that the Sr2FeWO6 has Fe2+ state. Sr2FeWO6 is an insulator with an antiferromagnetic transition temperature of 37 K. From the Mossbauer experiment, below similar to 20 K, a center shift of + 1.2 mm/s relative to metallic iron and a quadrupole splitting of 1.9 mm/s are obtained. The quadrupole splitting has strong temperature dependence. The hyperfine field is similar to 110 kOe which seems to be quite small. We concluded that the iron ground state of Sr2FeWO6 is Fe2+ high-spin (S = 2) state. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：1428 / 1429

页数：2