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Magnetic and photoconductive properties of the CoxPt1−x-Pt-TiO2 nanocomposite films prepared by reactive sputter-deposition |
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| Authors: | Changchuan Chen Tadakazu Sato Ji Shi Taro Toyoda |
| Affiliation: | a Department of Applied Physics and Chemistry, University of Electro-Communications, Chofu, Chofugaoka 1-5-1, Tokyo 182-8585, Japan b Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Megro-ku 212-1, Tokyo 152-8552, Japan |
| Abstract: | Co-Pt-Ti-O films were prepared on SiO2 glass substrate by sputtering of a Co-Pt-Ti composite target in Ar+O2 atmosphere with the total pressure of 4 Pa and then in situ annealed at an elevated temperature Ta to form the CoxPt1−x-TiO2 films. It is found that the ferromagnetic films grow in the form of fiber-like columnar grain about 10 nm in diameter when sputtered in the pressure ratio of O2/Ar=1/133 followed by in situ annealing at  The films contain Pt and amorphous anatase-type TiO2 phases besides the ferromagnetic fcc-CoxPt1−x phase. Thus, such nanocomposite films show photoconductive properties due to the anatase-type TiO2 phase as well as ferromagnetic properties due to the CoxPt1−x phase. |
| Keywords: | 75.50.Kj 75.50.Pp 81.05.Y 81.15.C |
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