Noncollinear spin structure in Fe3+xCo3−xTi2 ( x=0,2,3 ) from neutron diffraction
Noncollinear spin structure in Fe3+xCo3−xTi2 ( x=0,2,3 ) from neutron diffraction
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DOI：
10.1103/physrevmaterials.3.064403
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发表时间：
2019-06
影响因子：
3.4
通讯作者：
Haohan Wang;B. Balasubramanian;R. Pahari;R. Skomski;Yaohua Liu;A. Huq;D. Sellmyer;Xiaoshan Xu
中科院分区：
文献类型：
--
作者：
Haohan Wang;B. Balasubramanian;R. Pahari;R. Skomski;Yaohua Liu;A. Huq;D. Sellmyer;Xiaoshan Xu
Neutron powder diffraction has been used to investigate the spin structure of the hard-magnetic alloy $\mathrm{F}{\mathrm{e}}_{3+x}\mathrm{C}{\mathrm{o}}_{3\ensuremath{-}x}\mathrm{T}{\mathrm{i}}_{2}$ ($x=0,2,3$). The materials are produced by rapid quenching from the melt, they possess a hexagonal crystal structure, and they are nanocrystalline with crystallite sizes $D$ of the order of 40 nm. Projections of the magnetic moment onto both the crystalline $c$ axis and the basal plane were observed. The corresponding misalignment angle exhibits a nonlinear decrease with $x$, which we explain as a micromagnetic effect caused by Fe-Co site disorder. The underlying physics is a special kind of random-anisotropy magnetism that leads to the prediction of $1/{D}^{1/4}$ power-law dependence of the misalignment angle on the crystallite size.
Neutron powder diffraction has been used to investigate the spin structure of the hard-magnetic alloy $\mathrm{F}{\mathrm{e}}_{3+x}\mathrm{C}{\mathrm{o}}_{3\ensuremath{-}x}\mathrm{T}{\mathrm{i}}_{2}$ ($x=0,2,3$). The materials are produced by rapid quenching from the melt, they possess a hexagonal crystal structure, and they are nanocrystalline with crystallite sizes $D$ of the order of 40 nm. Projections of the magnetic moment onto both the crystalline $c$ axis and the basal plane were observed. The corresponding misalignment angle exhibits a nonlinear decrease with $x$, which we explain as a micromagnetic effect caused by Fe-Co site disorder. The underlying physics is a special kind of random-anisotropy magnetism that leads to the prediction of $1/{D}^{1/4}$ power-law dependence of the misalignment angle on the crystallite size.