Magnetic order and spin dynamics in substituted spinel Mg1-xMn2+xO4

被引：3
作者：
De Renzi, R
Allodi, G
Mazzoli, C
Ghigna, P
Malavasi, L
机构：
[1] Unita INFM Parma, I-43100 Parma, Italy
[2] Dipartimento Chim Fis, I-27100 Pavia, Italy
[3] Unita INFM Pavia, I-27100 Pavia, Italy
来源：
PHYSICA B-CONDENSED MATTER | 2003年 / 326卷 / 1-4期
关键词：
magnetism; spinel; non-collinear structures;
D O I：
10.1016/S0921-4526(02)01678-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We investigate the substituted spinel Mg1-xMn2+xO4, in five powder compositions 0 less than or equal to x less than or equal to 1, where divalent Mg is expected to occupy mainly the B spine] site. A zero-field precession is detected for all samples below an x-dependent ordering temperature, which is different from that detected by macroscopic magnetization. The precessing amplitude in the ordered phase displays temperature-dependent deviations from the canonical value of expected for our powder samples, indicating the presence of a radical state. The difference between the SQUID and the muSR-order temperatures is attributed to a collinear intermediate state stabilized by Mg. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：509 / 512
页数：4
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