Spin-wave stiffness in field-polarized Mn0.9Fe0.1Si is anisotropic (14.7 meV Ų parallel vs. 7.6 meV Ų perpendicular to the field), contradicting the isotropy expected from cubic symmetry in standard MnSi models.
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Anisotropy of spin waves in the field-polarized phase of Fe-doped MnSi
Spin-wave stiffness in field-polarized Mn0.9Fe0.1Si is anisotropic (14.7 meV Ų parallel vs. 7.6 meV Ų perpendicular to the field), contradicting the isotropy expected from cubic symmetry in standard MnSi models.