Electric field effect in diluted magnetic insulator anatase Co: TiO2 |
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| Authors: | Zhao T Shinde S R Ogale S B Zheng H Venkatesan T Ramesh R Das Sarma S |
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| Institution: | Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA. tongzhao@berkeley.edu |
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| Abstract: | An external electric field induced reversible modulation of a room temperature magnetic moment and coercive field is achieved in an epitaxial and insulating thin film of dilutely cobalt-doped anatase TiO2. This first demonstration of an electric field effect in any oxide-based diluted ferromagnet is realized in a high quality epitaxial heterostructure of PbZr(0.2)Ti(0.8)O(3)/Co: TiO(2)/SrRuO(3) grown on (001) LaAlO3. The observed effect, which is about 15% in strength in a given heterostructure, can be modulated over several cycles. Possible mechanisms for electric field induced modulation of insulating ferromagnetism are discussed. |
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