<正> 稀土金属R和3d过渡族金属M形成一系列金属间化合物,如RM_5,RM_2,R_2M_(17)等已作为新型磁性材料应用,而RM_(12)型化合物,可能由于除Mn以外,像Fe,Co,Ni等都不能建立RM_(12)相,并且RM_(12)是反铁磁的,以前研究较少。我们用Fe代Mn,研究三元金属间化合物R(Mn,Fe)_(12)单相存在的条件以及通过原子代换的方法,改变合金的电子组态和磁性离子间的相互作用,从而影响和改变物体的磁性。
The new ternary intermetallic compounds on the iron rich side Y(Mn_(1-x)Fe_x)_(12) have been prepared and their magnetic properties investigated. Their structure was found to be of the ThMn_(12) type with x=0.8 after appropriate annealing. The field dependence of magnetization was measured under range of 4.2 K to room temperature. The results indicate that Y(Mn_(1-x)Fe_x)_(12) appears antiferromagnetic when x=0.0, 0.2 or 0.4, in a spontaneous magnetization when x=0.6 and to become ferromagnetic or ferrimagnetic when x=0.8. The Curie point is above room temperature.
参考文献
| [1] | Deportes, J., Givord, D., Lemaire, R. and Nagai, H., Physica, 86-88B (1977) , 69-70 (c). |
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