Crystal field effects on spin pumping

Cahaya, Adam B.; Leon, Alejandro O.; Bauer, Gerrit E. W.


"Spin pumping" is the injection of spin angular momentum by a time-dependent magnetization into an adjacent normal metal proportional to the spin mixing conductance. We study the role of electrostatic interactions in the form of crystal fields on the pumped spin currents generated by insulators with exchange-coupled local moments at the interface to a metal. The crystal field is shown to render the spin currents anisotropic, which implies that the spin mixing conductance of insulator | normal metal bilayers depends on crystal cut and orientation. We interpret the interface "effective field" (imaginary part of the spin mixing conductance) in terms of the coherent motion of the equilibrium spin density induced by proximity in the normal metal.

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Título según WOS: ID WOS:000413764400004 Not found in local WOS DB
Título de la Revista: PHYSICAL REVIEW B
Volumen: 96
Número: 14
Fecha de publicación: 2017


Notas: ISI