The oxygen dependence of the magnetic structure for Sr3Fe2O7-δ

被引：7
|
作者：
Mori, K [1 ]
Kamiyama, T
Kobayashi, H
Arima, T
Ohoyama, K
Ikeda, S
机构：
[1] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[3] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[4] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2002年 / 74卷 / Suppl 1期
关键词：
D O I：
10.1007/s003390201373
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have measured the magnetization of single crystalline Sr3Fe2O6.5 with a lot of oxygen deficiencies. It was observed that the spin direction is parallel to the c-axis below T-N. Moreover, we carried out neutron powder diffraction experiments with a Sr3Fe2O6.21 powder sample.. The magnetic structure with a lot of oxygen deficiencies (delta > 0.5) has a typical Ising antiferromagnet system with the magnetic unit cell root2a x root2a x c. On the other hand, it was found that the magnetic structure Of Sr3Fe2O6.94 with a few oxygen deficiencies is larger than that of 2a x 2a x 4c. The magnetic structure of Sr3Fe2O6.94 is obviously different from that of Sr3Fe2O7-delta (8 > 0.5). Such a difference in the magnetic structures is associated with a drastic change of the exchange interactions between Fe-spins due to the introduction of oxygen.
引用
收藏
页码：S914 / S916
页数：3
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