Mossbauer studies on the spiral antiferromagnetic coupling in iron oxychloride

被引:8
|
作者
Dai, YD
Yu, Z [1 ]
He, Y
Huang, HB
Shao, T
Lin, J
Ali, AM
Jiang, ZY
Hsia, YF
机构
[1] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Inst Coordinat Chem, State Key Lab Coordinat Chem, Nanjing 210093, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1016/S0009-2614(02)00647-4
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Fe-57 Mossbauer spectroscopy has been used to study the noncolinear spiral antiferromagnetic coupling in FeOCl. The paramagnetic to antiferromagnetic transition occurs at 85 +/- 1 K. Our Mossbauer studies confirm that the preferential orientations of the spin of Fe3+ which are crystallographically of equivalent sites are parallel to the b and C axes with varied timescale of spin-spin relaxation as a result of competition among the intralayer antiferromagnetic superexchange coupling. ferromagnetic direct exchange coupling, and mixed interlayer dipolar-dipolar interaction. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:473 / 478
页数:6
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