Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653238 | Solid State Communications | 2005 | 5 Pages |
Abstract
Thin films of Ti1âxCoxO2 (x=0 and 0.03) have been prepared on sapphire substrates by spin-on technique starting from metalorganic precursors. When heat treated in air at 550 and 700 °C, respectively, these films present pure anatase and rutile structures as shown both by X-ray diffraction and Raman spectroscopy. Optical absorption indicate a high degree of transparency in the visible region. Such films show a very small magnetic moment at 300 K. However, when the anatase and the rutile films are annealed in a vacuum of 1Ã10â5 Torr at 500 and 600 °C, respectively, the magnetic moment, at 300 K, is strongly enhanced reaching 0.36μB/Co for the anatase sample and 0.68μB/Co for the rutile one. The ferromagnetic Curie temperature of these samples is above 350 K.
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Authors
R. Suryanarayanan, V.M. Naik, P. Kharel, P. Talagala, R. Naik,