Unconventional spin currents in magnetic films
Mesoscale and Nanoscale Physics
2020-06-16 v1
Abstract
A spin current - a flow of spin angular momentum - can be carried either by spin polarised free electrons or by magnons, the quanta of a moving collective oscillation of localised electron spins - a spin wave. Traditionally, it was assumed, that a spin wave in a magnetic film with spin-sink-free surfaces can transfer energy and angular momentum only along its propagation direction. In this work, using Brillouin light scattering spectroscopy in combination with a theory of dipole-exchange spin-wave spectra, we show that in obliquely magnetized free magnetic films the in-plane propagation of spin waves is accompanied by a transverse spin current along the film normal without any corresponding transverse transport of energy.
Cite
@article{arxiv.1904.12610,
title = {Unconventional spin currents in magnetic films},
author = {Dmytro A. Bozhko and Halyna Yu. Musiienko-Shmarova and Vasyl S. Tiberkevich and Andrei N. Slavin and Ihor I. Syvorotka and Burkard Hillebrands and Alexander A. Serga},
journal= {arXiv preprint arXiv:1904.12610},
year = {2020}
}