Magneto-Optical Properties of Magnetic Garnet Films Prepared by the Laser Ablation Method

Abstract

Tri-layered films composed of magnetic garnet Bi, Ge, Co: DyIG, highly Ga-substituted Bi: DyIG, and Bi, Ga: DyIG layers were deposited by the laser ablation method, and their magneto-optical properties were investigated. The Faraday rotation of the Bi, Ge, Co: DyIG, and Bi, Ga: DyIG layers showed opposite signs in the short-wavelength region from 0.45μm to 0.7μm. The magnetic moment of the Bi, Ge, Co-and Bi, Ga-DyIG layers independently switched in the presence of an external magnetic field. We proposed that the Bi, Ge, Co, and Bi, Ga substituted DyIG films are promising materials for wavelength multiplexing optical memory.