Neutron diffraction investigation of the magneto-elastic effect in LaMnO3

被引：19
|
作者：
Chatterji, Tapan [1 ]
Henry, Paul F. [1 ]
Ouladdiaf, Bachir [1 ]
机构：
[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
来源：
PHYSICAL REVIEW B | 2008年 / 77卷 / 21期
关键词：
D O I：
10.1103/PhysRevB.77.212403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated the magneto-elastic effect at the antiferromagnetic phase transition in LaMnO(3) by neutron powder diffraction. The intensity of the (001) magnetic reflection decreases continuously to become zero at T(N)approximate to 141 K indicating a second-order antiferromagnetic phase transition. The lattice parameters a and b (space group Pbnm) of LaMnO(3) show well-defined anomalies close to T(N)approximate to 140 K, whereas the third lattice parameter c and the unit-cell volume show only weak anomalies. The present investigation shows strong magneto-elastic effect in LaMnO(3) close to T(N).
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页数：4
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