Short period magnetization texture of B20-MnGe explained by thermally fluctuating local moments

نویسندگان

چکیده

B20-type compounds, such as MnSi and FeGe, host helimagnetic skyrmion phases at the mesoscale, which are canonically explained by combination of ferromagnetic isotropic interactions with weaker chiral Dzyaloshinskii-Moriya ones. Mysteriously, MnGe evades this paradigm it displays a noncollinear magnetic state much shorter nanometer scale. Here we show that length scale volume-dependent properties stem from purely exchange interactions, generally obtained in paramagnetic state. Our approach is validated comparing canonical B20-helimagnet FeGe. The free energy calculated, how triple-q states can stabilize adding higher-order interactions.

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ژورنال

عنوان ژورنال: Physical review

سال: 2021

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevb.103.024410