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- W2312214859 abstract "We report on the genuine origin of the anisotropy of the magnetization $M$ in rare-earth (RE) metals and RE-based alloys. Taking Ho-based layered nanostructures as testing ground, we prove that the anisotropy of M is substantial despite that the sixfold magnetic anisotropy constant ${K}_{6}^{6}$ vanishes, which contradicts the established wisdom [E. R. Callen and H. B. Callen, J. Phys. Chem. Solids 16, 310 (1960)]. Furthermore, we show that the symmetric anisotropic contributions to $M$ and ${K}_{6}^{6}$ vary with temperature distinctively from one another, which indicates that both anisotropic effects are unrelated and stem from dissimilar microscopic sources. Our findings are discussed according to the theory [R. J. Elliott and M. F. Thorpe, J. Appl. Phys. 39, 802 (1968)] that predicts the emergence of symmetric anisotropic indirect-exchange terms under the presence of orbital moments. We show evidence that the anisotropy of $M$ is caused by the indirect-exchange coupling among localized $4f$ magnetic moments mediated by spin-orbit coupled conduction electrons, which ultimately generates a spatially nonuniform spin polarization that replicates the lattice symmetry." @default.
- W2312214859 created "2016-06-24" @default.
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- W2312214859 date "2014-08-11" @default.
- W2312214859 modified "2023-10-09" @default.
- W2312214859 title "Direct evidence of the anisotropy of magnetization in rare-earth metals and rare-earth/Fe2alloys" @default.
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- W2312214859 doi "https://doi.org/10.1103/physrevb.90.054407" @default.
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