Magneto-optical visualization by Bi:YIG thin films prepared at low temperatures

摘要

A device for the imaging of magnetic fields and domain structures based on the Faraday effect has been developed using garnet thin films prepared by the metal-organic decomposition method as indicators. The sensitivity was improved by using high concentration bismuth substituted yttrium iron garnet thin films with in-plane magnetic anisotropy. Low temperature synthesis of the films (Bi_xY_(3-x)Fe_5O_(12); x = 2) on glass substrates of thickness about 0.8 /μm is described and the Faraday rotation angle is measured to be about - 11°/μm.