Photo-induced effect on optical absorption coefficient in yttrium iron garnet

Photoproduction of long-lived holes and electronic processes in intrinsic electric fields seen through photoinduced absorption and dichroism in Ca3Ga2 xMnxGe3O12garnets

“…Long-lived photoinduced phenomena in magnetic insulators were observed by many research groups [1][2][3][4][5][6][7][8][9][10][11][12][13] and associated with the photoinduced transfer of charges. In ferromagnets or ferrimagnets, whose Curie temperature exceeds the upper temperature boundary of the existence of long-lived photoinduced phenomena, interrelated photoinduced changes in optical and magnetic properties make up a complicated physical picture difficult for microscopic interpretation.…”

“…For example, the illumination of yttrium iron garnet Y 3 Fe 5 O 12 0953-8984/03/234025+20$30.00 © 2003 IOP Publishing Ltd Printed in the UK with linearly polarized light induces a change of magnetic anisotropy [1][2][3], linear dichroism [3] and domain structure [4]. Unpolarized light affects magnetic permeability and susceptibility [5,6], coercivity and mobility of domain walls [7,8], magnetostriction [9] and optical absorption [10,11].…”