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- W4387156737 abstract "In cubic helimagnets MnSi and Cu2OSeO3 with their nearly isotropic magnetic properties, the magnetic structure undergoes helical deformation, which is almost completely determined by the helicoid wavenumber k = D / J, where magnetization field stiffness J is associated with isotropic spin exchange, and D is a pseudoscalar value characterizing the antisymmetric Dzyaloshinskii-Moriya (DM) interaction. While the wavenumber can be measured directly in a diffraction experiment, the values of J and D can be calculated from the constants of pair spin interactions, which enter as parameters into the Heisenberg energy. However, the available analytical expression for D, which is of the first order in the spin-orbit coupling (SOC), has significant problems with accuracy. Here we show that hardly observable distortions of the magnetic structure, namely the antiferromagnetic spin cantings, can significantly change the constant D in the next approximation in SOC, thus affecting the wavenumber of magnetic helicoids. The obtained analytical expressions agree with the results of numerical simulation of magnetic helices in Cu2OSeO3 to within a few percent." @default.
- W4387156737 created "2023-09-30" @default.
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- W4387156737 date "2023-09-25" @default.
- W4387156737 modified "2023-09-30" @default.
- W4387156737 title "The influence of antiferromagnetic spin cantings on the magnetic helix pitch in cubic helimagnets" @default.
- W4387156737 doi "https://doi.org/10.48550/arxiv.2309.14480" @default.
- W4387156737 hasPublicationYear "2023" @default.
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