Abstract
Controlling magnetization of magneto-optical materials by voltage instead of electric current is expected to reduce power consumption and miniaturize functional elements in magneto-optical devices such as magneto-optical spatial light modulator. In this study, highly Bi-substituted neodymium iron gallium garnet, Nd0.5Bi2.5Fe4.5Ga0.5O12, thin film on gadolinium gallium garnet substrate prepared by metal organic decomposition method, which has excellent magneto-optical properties in visible wavelength region, was investigated as one of candidates for such devices. The thin film was cemented on a lead zirconate titanate polycrystal chip to apply external stress to the thin film. When the stress was applied, increase of coercivity has been observed by magneto-optical Kerr microscope due to reverse magnetostrictive effect. The result suggested the possibility of the Nd0.5Bi2.5Fe4.5Ga0.5O12 thin film as strain-mediated voltage controlled magneto-optical devices.
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