Abstract

The behavior of soft magnetic films in spring magnets, as a function of the intensity andorientation of an external magnetic field, is described in the framework of spin-polarizednon-collinear electronic structure calculations. As experimentally observed, the criticalintensity of the external field required for the onset of the non-collinear spiral formationdepends on both the thickness of the soft magnetic phase and the orientation of the field.The spin spiral structure undergoes a change of chirality in rotating fields. Ourtheoretical approach opens new prospects for investigating the response of othernanostructures to external magnetic fields beyond usual phenomenological models.

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