Néel transition in (Mg,Fe)O: A possible change of magnetic structure
Néel transition in (Mg,Fe)O: A possible change of magnetic structure
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(Mg,Fe)O 中的尼尔跃迁：磁性结构的可能变化
DOI：
10.2138/am.2011.3534
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发表时间：
2011
影响因子：
3.1
通讯作者：
T. Sakaiya
中科院分区：
文献类型：
--
作者：
A. Fujii;T. Kondo;T. Taniguchi;T. Sakaiya
用超导量子干涉仪（SQUID）研究了（Mg_（1-X），Fe_x）O在5-300 K温度范围内，在1000 Oe恒磁场下的Néel温度（TN）及其组成关系，测定了常压下的磁相图。当TN随着铁含量的增加而不断增加时，我们发现在X = 0.5附近的顺磁-反铁磁边界中存在一个扭结，这表明反铁磁状态下的磁结构可能发生变化。我们提出磁边界终止于X = 0.12（1）和0 K。结果表明，如果（Mg，Fe）O菱面体畸变与磁有序化有关，则其畸变压力对Fe含量非常敏感
Abstract The Néel temperature (TN) of (Mg1-X,FeX)O and its compositional dependence have been studied with a superconducting quantum interference device (SQUID) in the temperature range 5-300 K at constant magnetic field of 1000 Oe. We determined the magnetic phase diagram at ambient pressure. As the TN constantly increased with iron content, we found a kink in the paramagnetic-antiferromagnetic boundary at around X = 0.5, which suggests a possible change of the magnetic structure in the antiferromagnetic state. We propose that the magnetic boundary ends at X = 0.12(1) and 0 K. Our results show that the pressure of the rhombohedral distortions of (Mg,Fe)O can be very sensitive to Fe content if the structure distortion is correlated to magnetic ordering