title: Electric field effect in diluted magnetic insulator anatase Co: TiO2.
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.
authors.affiliation: Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA. tongzhao@berkeley.edu
authors.forename: T
authors.initials: T
authors.lastname: Zhao
authors.forename: S R
authors.initials: SR
authors.lastname: Shinde
authors.forename: S B
authors.initials: SB
authors.lastname: Ogale
authors.forename: H
authors.initials: H
authors.lastname: Zheng
authors.forename: T
authors.initials: T
authors.lastname: Venkatesan
authors.forename: R
authors.initials: R
authors.lastname: Ramesh
authors.forename: S
authors.initials: S
authors.lastname: Das Sarma