HIGH-TEMPERATURE PHOTOMAGNETISM IN CO-DOPED YTTRIUM-IRON-GARNET FILMS

Magnetization processes in (YCa)(3)(FeCoGe)(5)O-12 epitaxial films ind uced by linearly polarized argon laser light (lambda = 0.488 mu m) wer e observed at room temperature. These processes happened through a dis placement of boundary between magnetic domain phases with different in -plane magnetization components. The direction and amplitude of the di splacement depended on the polarization direction and light intensity. The results are explained within the scope of a phenomenological theo ry of photoinduced anisotropy. The microscopic origin of the photomagn etic effect in investigated materials is qualitatively discussed.