Ferro-and antiferromagnetic ordering in LaMnO3+δ

被引：0
|
作者：
A. N. Pirogov
A. E. Teplykh
V. I. Voronin
A. E. Kar'kin
A. M. Balagurov
V. Yu. Pomyakushin
V. V. Sikolenko
A. N. Petrov
V. A. Cherepanov
E. A. Filonova
机构：
[1] Ural Branch of the Russian Academy of Sciences,Institute of Metal Physics
[2] Joint Institute for Nuclear Research,undefined
[3] Ural State University,undefined
来源：
Physics of the Solid State | 1999年 / 41卷
关键词：
Oxygen; Spectroscopy; State Physics; Wave Vector; Sample Volume;
D O I：
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中图分类号：
学科分类号：
摘要：
A neutron diffraction study of the crystalline structure and magnetic state of LaMnO3+δ samples with different deviations from oxygen stoichiometry has been made at 4.2 K. It is shown that annealing at reduced oxygen pressure is accompanied by transformation of the magnetic structure from ferromagnetic, with magnetic moments parallel to the b axis, to antiferromagnetic, with the wave vector k=0 and the moments along the a axis (space group Pnma). A comparison of experimental with expected Mn ion moments suggests that magnetic order does not extend throughout the sample volume. Part of the Mn ions form magnetic clusters ∼20 Å in size.
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页码：91 / 96
页数：5
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