Magnetic circular dichroism study on YIG films (original) (raw)
1979, Journal de Physique
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Enhancing magneto-optical and structural properties of Bi-YIG thin film on glass substrate using polyvinylpyrrolidone assisted MOD method
A R T I C L E I N F O Keywords: Bi-YIG thin films Faraday rotation (FR) angle Magneto-optical (MO) properties Metal-organic decomposition (MOD) method Polyvinylpyrrolidone (PVP) A B S T R A C T A bismuth-substituted yttrium iron garnet (Bi-YIG) thin film on a glass substrate with high magneto-optical (MO) performance was fabricated using metal-organic decomposition (MOD). To enhance the MO performance of the as-grown Bi-YIG thin film, different amounts of polyvinylpyrrolidone (PVP) were introduced to a metal nitrate precursor solution as a reducing agent and growth modifier. By using the optimized concentration, we have obtained a Bi-YIG thin film that exhibited good morphology, high crystallinity, and high saturation magneti-zation. The Faraday rotation (FR) angle of this film reached its highest value of −8.0°/μm, which is close to that of thin films fabricated on gadolinium gallium garnet substrates (−10.5°/μm). Moreover, Bi x Y 3−x Fe 5 O 12 films with different Bi substitutions were synthesized; these films showed a higher FR angle, of up to −12.0°/μm (Bi 2.5 Y 0.5 Fe 5 O 12), in which the peak position of the FR angle resided in the visible range (505-540 nm). This work reveals that high-quality Bi-YIG thin films on glass substrates via MOD are promising for MO device applications.
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