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 pulsed laser ablation (PLA) method, and their magneto-optical properties were investigated. The first and third magnetic layers in the tri-layered film showed the different Faraday rotation spectrum in the short-wavelength region from 400 nm to 700 nm. The Faraday rotation of the Bi, Ge, Co:DyIG and Bi, Ga:DyIG films had maximum values for wavelength of around 435 nm and 490 nm, respectively. The coercivity (Hc) and Faraday rotation of the Bi0.31Dy3.0Ge0.32Co0.36Fe4.01O12 film showed nonlinear dependence on the annealing temperature (Ta), and Hc reached a value of 7 kOe at Ta = 860°C. The same film annealed at Ta=880°C showed a compensation temperature near room temperature.
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