Year: 2013
Type: article
Abstract: We report a theoretical study of light diffraction by a spherical magnetic particle with a vortex magnetization distribution. It is shown that the intensity of the diffracted light involves a nonreciprocal contribution. This contribution depends on the vorticity of particle magnetization. It appears due to the excitation of an electric quadrupole, magnetic dipole, and the addition to the electric dipole moment in the particle, which depend on the particle magnetization vorticity. The dependence of the nonreciprocal contribution on particle parameters and geometry of diffraction is analyzed separately for the specified moments. The calculation of the effect for a cobalt particle and two linear polarizations of the incident light fits the data of recent experimental studies in the lattice of triangle magnetic particles by an order of magnitude.
Source: Physical Review B
Author: E. A. Karashtin
Institution: Institute for Physics of Microstructures
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1556611140