Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2

T. Zhao; S. R. Shinde; S. B. Ogale; H. Zheng; T. Venkatesan; R. Ramesh; S. Das Sarma

doi:10.1103/PhysRevLett.94.126601

Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2

Materials Science 2009-11-10 v1

Authors: T. Zhao , S. R. Shinde , S. B. Ogale , H. Zheng , T. Venkatesan , R. Ramesh , S. Das Sarma

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Abstract

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.

Keywords

diluted magnetic insulator electric field effect anatase Co:TiO2 ferromagnetism modulation epitaxial thin film

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@article{arxiv.cond-mat/0404172,
  title  = {Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2},
  author = {T. Zhao and S. R. Shinde and S. B. Ogale and H. Zheng and T. Venkatesan and R. Ramesh and S. Das Sarma},
  journal= {arXiv preprint arXiv:cond-mat/0404172},
  year   = {2009}
}

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14 pages, 4 figures

Electric Field Effect in Diluted Magnetic Insulator Anatase Co:TiO2

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