Substitution Effects of Cr or Fe on the Curie Temperature for Mn-Based Layered Compounds MnAlGe and MnGaGe With Cu2Sb-Type Structure
Substitution Effects of Cr or Fe on the Curie Temperature for Mn-Based Layered Compounds MnAlGe and MnGaGe With Cu2Sb-Type Structure
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Cr或Fe的取代对Cu2Sb型锰基层状化合物MnAlGe和MnGaGe居里温度的影响
DOI：
10.1109/tmag.2014.2321592
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发表时间：
2015
影响因子：
2.1
通讯作者：
and H. Kawarada
中科院分区：
文献类型：
--
作者：
R.Y. Umetsu;Y. Mitsui;I. Yuito;T. Takeuchi;and H. Kawarada
研究了具有cu2sb型结构的MnAlGe和MnGaGe化合物及其取代化合物的结构、晶格参数、自发磁化强度（）和居里温度（）。Cr取代Mn增强了它们，而Fe取代Mn则降解了它们。这些行为与前人报道的结果一致，也为MnGaGe化合物系列所共有。对于MnAlGe， Cr和Fe取代后，晶格参数分别增加0.2%和0.4%，而变化幅度分别为+0.1%和- 1.3%。对于MnGaGe， Cr取代降低0.08%，Fe取代增加0.2%，变化幅度分别为+0.5%和- 1.0%。随长度的增加而增加，表明Mn层间距离是与高度（即磁交换相互作用强度）有关的关键因素。
Structure, lattice parameters, spontaneous magnetization (), and the Curie temperature () of MnAlGe and MnGaGe compounds with the Cu2Sb-type structure and their substituted compounds were investigated. Cr substitution for Mn enhancedand, whereas Fe substitution for Mn degraded them. These behaviors are in accord with the previously reported results, and are also common to the MnGaGe compound series. For MnAlGe, lattice parameterincreases by 0.2% and 0.4% for Cr and Fe substitution, whilechanges by +0.1% and −1.3%, respectively. For MnGaGe,decreases by 0.08% for Cr and increases by 0.2% for Fe substitution, whilechanges by +0.5% and −1.0%, respectively.tended to increase with increasing length of, suggesting that the interlayer distance between Mn layers is a key factor related to the height of, i.e., the strength of the magnetic exchange interaction.