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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Hyperfine Interactions in Sc_(1-x)Y_xFe_2 Cubic Laves Alloys
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Hyperfine Interactions in Sc_(1-x)Y_xFe_2 Cubic Laves Alloys

机译:Sc_(1-x)Y_xFe_2立方Laves合金中的超精细相互作用

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摘要

Effects of hybridization of 3d bands or iron with 3d bands of scandium and 3d bands of yttrium in Sc_(1-x)Y_xFe_2 cubic Laves alloys (0 ≤ x ≤ 1) are studied by the nuclear magnetic resonance method. The concentration dependences of the lattice parameters a, saturation magnetization σ, and hyperfine fields at the ~(57)Fe, ~(45)Sc, and ~(89)Y nuclei-as well as the ~(27)Al impurity nuclei, whose atoms substitute iron atoms in the lattices of these alloys-are measured. The "local" and "induced" contributions to hyperfine fields at the ~(57)Fe nuclei are separated and the magnetic moments at iron atoms are estimated. It is found that the hybridization effect leads to the formation of magnetic moments at Sc and Y atoms (whose direction is opposite to the direction of the magnetic moment at iron atoms) and is responsible for the ferrimagnetic structure in Sc_(1-x)Y_xFe_2 alloys.
机译:通过核磁共振法研究了Sc_(1-x)Y_xFe_2立方拉夫合金中3d能带或铁与3的3d能带和钇的3d能带杂化的影响。 〜(57)Fe,〜(45)Sc和〜(89)Y原子核以及〜(27)Al杂质核的晶格参数a,饱和磁化强度σ和超精细场的浓度依赖性,测量其原子取代这些合金晶格中的铁原子。分离了〜(57)Fe原子核对超精细场的“局部”和“感应”贡献,并估算了铁原子处的磁矩。发现杂化效应导致在Sc和Y原子处形成磁矩(其方向与在铁原子处的磁矩方向相反),并导致Sc_(1-x)Y_xFe_2中的亚铁磁结构合金。

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