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Crystal chirality and skyrmion helicity in MnSi and (Fe, Co)Si as determined by transmission electron microscopy

机译:透射电子显微镜测定的MnSi和(Fe,Co)Si中的晶体手性和Skyrmion螺旋

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摘要

The magnetic skyrmions as derived from the proper screw spin state in chiral-lattice magnets (e.g., MnSi) show the intrinsic spin swirling direction or the magnetic helicity. The crystal chirality (Γ_c) and skyrmion helicity (γ_s) were simultaneously determined at the identical specimen areas of MnSi and Fe_(1-x)Co_xSi (x = 0.2,0.5) by using convergent-beam electron diffraction and Lorentz transmission electron microscopy techniques, respectively. The reversal of the Γ_c-γ_s correlation is observed between MnSi and Fe_(1-x)Co_xSi and ascribed to the different sign of the Dzyaloshinskii-Moriya interaction between both compounds.
机译:由手性晶格磁体中适当的螺旋自旋态(例如MnSi)衍生的磁性天体离子显示出固有的自旋涡旋方向或磁螺旋度。使用会聚束电子衍射和洛伦兹透射电子显微镜技术同时测定了MnSi和Fe_(1-x)Co_xSi(x = 0.2,0.5)的相同试样区域上的晶体手性(Γ_c)和天空离子螺旋度(γ_s) , 分别。在MnSi和Fe_(1-x)Co_xSi之间观察到Γ_c-γ_s相关性的逆转,并且归因于两种化合物之间Dzyaloshinskii-Moriya相互作用的不同符号。

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  • 来源
    《Physical review》 |2013年第2期|024408.1-024408.4|共4页
  • 作者单位

    RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan;

    Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan;

    Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan;

    RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan;

    RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan,Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    skyrmions; transmission electron microscopy (TEM) (including STEM, HRTEM, etc.);

    机译:天rm透射电子显微镜(TEM)(包括STEM;HRTEM等);

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