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- W2078692593 abstract "The isotropic and anisotropic exchange energies in phosphide and arsenide compounds with helical or ferromagnetic structures have been studied by means of an anisotropic two-band model. The anisotropic term is separated into a symmetric and an antisymmetric contribution. It appears that, in crystals with non-vanishing spin-orbit interaction, a circular isotropic helix minimizes the antisymmetric contribution (AEI) to the exchange energy. The helix is stable if the AEI compensates for the increase in the symmetric anisotropic energy that the deviation from a non-collinear spin arrangement causes. The band model predicts the correct ground state, with the exception of MnP, where the helical (ground state) and the ferromagnetic (high-temperature phase) configurations correspond to the same energy. The results confirm that the AEI and the shape of the Fermi surface are crucial for the stability of a helical magnetic structure." @default.
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- W2078692593 date "1992-06-29" @default.
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- W2078692593 title "Symmetric and antisymmetric anisotropic exchange energies as crucial factors for the magnetic structures in MnP, FeP, CrAs and MnAs" @default.
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- W2078692593 doi "https://doi.org/10.1088/0953-8984/4/26/006" @default.
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