Influence of Al substitution on the structure and co-sublattice magnetocrystalline anisotropy of Gd2Co17 compounds (vol 70, pg 3467, 1997)
Influence of Al substitution on the structure and co-sublattice magnetocrystalline anisotropy of Gd2Co17 compounds (vol 70, pg 3467, 1997)
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DOI：
10.1063/1.119258
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发表时间：
1997-06
影响因子：
7.2
通讯作者：
Zhaohua Cheng;B. Shen;Jx Zhang;B. Liang;Hq Guo;H. Kronmuller
中科院分区：
文献类型：
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作者：
Zhaohua Cheng;B. Shen;Jx Zhang;B. Liang;Hq Guo;H. Kronmuller
研究了Gd2Co17−xAlx化合物的结构和磁性能。所有样品都具有菱面体th2zn17型结构，用Al取代Co导致单位胞体积以8.2 A3/Al的速率近似线性增加。随着铝浓度的增加，居里温度呈单调下降趋势。根据补偿温度下的磁化曲线，确定了亚晶格间分子场系数nRT和RT交换耦合常数JRT。值得注意的是，Al的取代对Co亚晶格的磁晶各向异性有显著影响，使Gd2Co17−xAlx化合物的易磁化方向由基面向c轴改变。
The structure and magnetic properties of Gd2Co17−xAlx compounds were investigated. All samples have a rhombohedral Th2Zn17-type structure and the replacement of Co by Al results in an approximately linear increase in the unit cell volumes at a rate of 8.2 A3/Al. The Curie temperature decreases monotically with the increase of Al concentration. On the basis of magnetization curves at the compensation temperature, the intersublattice-molecular-field coefficient, nRT, and the RT exchange-coupling constant JRT have been determined. It is noteworthy that the substitution of Al has a significant effect on the magnetocrystalline anisotropy of the Co sublattice, and changes the easy magnetization direction of Gd2Co17−xAlx compounds from the basal plane to the c axis.