Spin motive forces due to magnetic vortices and domain walls

Article

关键词: ELECTRIC-CURRENT;    DYNAMICS;    FERROMAGNETS;    EXCITATION;    FILMS;    FIELD;   

DOI  :  10.1103/PhysRevB.84.014414

来源: SCIE

【 摘 要 】

We study spin motive forces, that is, spin-dependent forces and voltages induced by time-dependent magnetization textures, for moving magnetic vortices and domain walls. First, we consider the voltage generated by a one-dimensional field-driven domain wall. Next, we perform detailed calculations on field-driven vortex domain walls. We find that the results for the voltage as a function of magnetic field differ between the one-dimensional and vortex domain walls. For the experimentally relevant case of a vortex domain wall, the dependence of voltage on the field around Walker breakdown depends qualitatively on the ratio of the so-called beta parameter to the Gilbert damping constant and thus provides a way to determine this ratio experimentally. We also consider vortices on a magnetic disk in the presence of an ac magnetic field. In this case, the phase difference between field and voltage on the edge is determined by the beta parameter, providing another experimental method to determine this quantity.

【 授权许可】

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