%0 Journal Article
%K Pulsed laser deposition
%K Titanium dioxide
%K Ferromagnetism
%K Ferromagnetic materials
%K Electric insulators
%K Strontium compounds
%K Magnetization
%K Magnetic moments
%K Heterojunctions
%K Lead compounds
%K Coercive force
%K Cobalt
%K Electric field effects
%K Manganites
%K Hall effect
%K Anomalous Hall effect (AHE)
%K Diluted magnetic semiconductors (DMS)
%K Magnetic insulators
%K Photolithography
%K Polarons
%A T Zhao
%A S.R Shinde
%A S.B Ogale
%A H Zheng
%A T Venkatesan
%A Ramamoorthy Ramesh
%A S.D Sarma
%B Physical Review Letters
%D 2005
%G eng
%R 10.1103/PhysRevLett.94.126601
%T Electric field effect in diluted magnetic insulator anatase Co: TiO 2
%V 94
%X 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 TiO 2. This first demonstration of an electric field effect in any oxide-based diluted ferromagnet is realized in a high quality epitaxial heterostructure of PbZr 0.2Ti 0.8O 3/Co: TiO 2/SrRuO 3 grown on (001) LaAlO 3. 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. © 2005 The American Physical Society.