Abstract
We report an experimental study on the effect of magnetic annealing process on the optical and magneto-optical properties of Ce-substituted yttrium iron garnet thin films incorporating gold nanoparticles. Au nanoparticles were formed by heating an Au thin film on a cubic quartz substrate in a vacuum chamber and a Ce : YIG layer was deposited on them by the aid of the pulsed laser deposition method. Our results show that magnetic annealing leads to an increase in nanoparticle sizes and directs the magnetization to lie on the sample's surface. Hence, Faraday rotation signal decreases and a sufficient increase in the longitudinal magneto-optical Kerr effect occurs at different oblique incidence angles. Tuning the surface plasmon resonance band by changing the angle of incidence of the excitation light would add an additional degree of freedom and flexibility to the development of magneto-optical sensors.
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