期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 25, 期 15, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/25/15/156001
关键词
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资金
- CONICYT
- FONDECYT [1120618]
- Proyecto PIIC [2012-UTFSM]
- DGIP-USM [11.12.17]
- Centro para el Desarrollo de la Ciencia y la Nanotecnologia [CEDENNA FB0807]
We have developed a theory that describes the spin-wave spectra of ferromagnetic films with Dzyaloshinskii-Moriya interactions. In agreement with recent experiments (Zakeri et al 2010 Phys. Rev. Lett. 104 137203), we demonstrate that the spin-wave dispersion relation is asymmetric with respect to wave vector inversion for a variety of ferromagnetic films with Dzyaloshinskii-Moriya interactions and different crystallographic classes. It is also predicted that, for non-zero wave vectors, the resonance frequency and resonance field can increase or decrease depending on the spin-wave vector orientation. We provide explicit formulas for the spin-wave dispersion relation and its asymmetry, as well as for the dynamic susceptibility for a film under microwave excitation, that can be used to understand ferromagnetic resonance as well as Brillouin light scattering experiments in these classes of magnetic thin films.
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