Magneto-optical spectroscopy of diluted magnetic oxides TiO2−δ: Co
We report an experimental study on transversal Kerr effect (TKE) in magnetic oxide semiconductors TiO2-delta:Co. The TiO2-delta: Co thin films were deposited on LaAlO3 (0 0 1) substrates by magnetron sputtering in the argon-oxygen atmosphere at oxygen partial pressure of 2X10-6-2X10-4 Torr. It was o...
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| Published in: | Journal of magnetism and magnetic materials Vol. 321; no. 7; pp. 723 - 725 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-04-2009
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| Online Access: | Get full text |
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| Summary: | We report an experimental study on transversal Kerr effect (TKE) in magnetic oxide semiconductors TiO2-delta:Co. The TiO2-delta: Co thin films were deposited on LaAlO3 (0 0 1) substrates by magnetron sputtering in the argon-oxygen atmosphere at oxygen partial pressure of 2X10-6-2X10-4 Torr. It was obtained that TKE spectra in ferromagnetic samples are extremely sensitive to the Co-volume fraction, the crystalline structure, and technology parameters. The observed well-pronounced peaks in TKE spectra for anatase Co-doped TiO2-delta films at low Co ( < 1%) volume fraction are not representative for bulk Co or Co clusters in TiO2-delta matrix that indicates on intrinsic ferromagnetism in these samples. With increase of Co-volume fraction up to 5-8% the fine structure of TKE spectra disappears and magneto-optical response in reflection mode becomes larger than that for thick Co films. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2008.11.035 |