Field-induced magnetoelastic instabilities in antiferromagnetic molecular wheels -: art. no. 027206

被引：17
|
作者：
Waldmann, O [1 ]
Dobe, C
Ochsenbein, ST
Güdel, HU
Sheikin, I
机构：
[1] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland
[2] CNRS, Grenoble High Magnet Field Lab, F-38042 Grenoble, France
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 02期
关键词：
D O I：
10.1103/PhysRevLett.96.027206
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The magnetic torque of the antiferromagnetic molecular wheel CsFe8 was studied down to 50 mK and up to 28 T. Below about 0.5 K phase transitions were observed at the field-induced level crossings (LCs). Intermolecular magnetic interactions are very weak excluding field-induced magnetic ordering. A magnetoelastic coupling was considered. A generic model shows that the wheel structure is unconditionally unstable at the LCs, and the predicted torque curves explain the essential features of the data well.
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页数：4
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