Micromagnetism and topologic defects in magnetoelectric media

Abstract

Micromagnetism and topologic defects in magnetoelectric media This paper brieêy reviews research into magnetoelectric materials and multiferroics as domain-structured media. The review is focused on magnetoelectric phenomena in epitaxial iron garnet élms (electrically induced displacement and tilting of domain boundaries) as a striking example of magnetoelectricity in micromagnetism. The paper also considers the effect of an electric éeld on other topological defects in magnetically ordered media, including Bloch lines and Bloch points at domain boundaries, magnetic vortices, and skyrmions.

Ultrafast laser-induced changes of the magnetic anisotropy in a low-symmetry iron garnet film

“…Thin magnetic garnet films with uniaxial anisotropy were among the model media for developing magnetic bubble domain technology, 14,15 and became of interest recently again owing to certain analogies between bubble domains and skyrmions, 16 , and to possibility of controlling domain walls by localized electric fields. 17,18 Nowadays, thin YIG films are the model functional media for testing various concepts of magnonics, 19 owing to their exceptionally low spin waves damping, 20 and novel effects at the dielectric garnet/metal interfaces. 21 This outstanding functionality of the magnetic garnet films originates from the fact, that their magnetization, magnetic anisotropy, compensation points and other properties can be tailored in a wide range.…”