Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2

Details Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2 Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2

2004-04-07

arxiv.org/abs/cond-mat/0404172v1

Physics

Condensed Matter

Materials Science

14 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.126601

An external electric field induced reversible modulation of room temperature magnetic moment is achieved in an epitaxial and insulating thin film of dilutely cobalt-doped anatase TiO2. This first demonstration of electric field effect in any oxide based diluted ferromagnet is realized in a high quality epitaxial heterostructure of PbZr0.2Ti0.8O3/Co:TiO2/SrRuO3 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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