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High-throughput characterization of BixY3−xFe5O12 combinatorial thin films by magneto-optical imaging technique |
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| Authors: | XR Zhao W-Q Lu Y Konishi T Ishibashi Y Matsumoto T Hasegawa |
| Institution: | a National Institute for Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan b Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuda-cho, Midori-ku, Yokohama 226-8503, Japan c Department of Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan d Neoark Corporation, 2-8-33 Wakamatsu-cho Fuchu-shi, Tokyo, Japan e Department of Applied Physics, Faculty of Technology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan |
| Abstract: | BixY3−xFe5O12 thin films have been grown on GGG (Gd3Ga5O12) (1 1 1) substrates by the combinatorial composition-spread techniques under substrate temperature (Tsub) ranging from 410 to 700 °C and O2 pressure of 200 mTorr. In order to study the effect of substrates on the deposition of BixY3−xFe5O12 thin films, garnet substrates annealed at 1300 °C for 3 h were also used. Magneto-optical properties were characterized by our home-designed magneto-optical imaging system. From the maps of Faraday rotation angle θF, it was evident that the Faraday effect appears only when Tsub = 430-630 °C. θF reaches to the maximum value (∼6°/μm, λ = 632 nm) at 500 °C, and is proportional to the Bi contents. XRD and EPMA analyses showed that Bi ions are easier to substitute for Y sites and better crystallinity is obtained for annealed substrates than for commercial ones. |
| Keywords: | Combinatorial materials science Magneto-optical imaging Faraday rotation BixY3&minus xFe5O12 thin film |
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