title: Giant electric field modulation of double exchange ferromagnetism at room temperature in the perovskite manganite/titanate p-n junction.
abstract: We report on the electrical modulation of double exchange ferromagnetism at room temperature in hole-doped manganites of a metal oxide p-n junction. In this (La0.9Ba0.1)MnO(3)/Nb doped SrTiO3 p-n junction, the temperature dependence of the junction resistance shows a metal-insulator transition whose temperature, corresponding to that of ferromagnetic transition, is hugely modulated from 290 to 340 K by a bias voltage increasing from +1.0 to +1.8 V. The magnetoresistance can also be modulated electrically.
authors.affiliation: Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Tanaka
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Tomoji
authors.initials: T
authors.lastname: Kawai