Il. Lyubchanskii et al., DOMAIN AND DOMAIN-WALL CONTRIBUTIONS TO OPTICAL 2ND-HARMONIC GENERATION IN THIN MAGNETIC-FILMS, Journal of applied physics, 81(8), 1997, pp. 5668-5670
A symmetry analysis of nonlinear-optical imaging of domains and domain
walls in thin magnetic films is presented. Different contributions to
the second harmonic (SH) response depending on the local magnitude of
the film magnetization M as well as on its spatial derivatives are ca
lculated. The polarization of the SH light is shown to be a sensitive
function of the relative weight of different magnetization-induced con
tributions, the film symmetry, and the type of the domain wall. (C) 19
97 American Institute of Physics.