title: Evidence for a magnetic proximity effect up to room temperature at Fe/(Ga, Mn)As interfaces.
abstract: We report x-ray magnetic circular dichroism and superconducting quantum interference device magnetometry experiments to study magnetic order and coupling in thin Fe/(Ga, Mn)As(100) films. We observe induced magnetic order in the (Ga, Mn)As layer that extends over more than 2 nm, even at room temperature. We find spectroscopic evidences of a hybridized d configuration of Mn atoms in Fe/(Ga, Mn)As, with negligible Mn diffusion and/or MnFe intermixing. We show by experiment as well as by theory that the magnetic moment of the Mn ions couples antiparallel to the moment of the Fe overlayer.
authors.affiliation: Laboratorio Nazionale TASC, INFM-CNR, in Area Science Park, S.S. 14, Km 163.5, I-34012, Trieste, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Maccherozzi
authors.forename: M
authors.initials: M
authors.lastname: Sperl
authors.forename: G
authors.initials: G
authors.lastname: Panaccione
authors.forename: J
authors.initials: J
authors.lastname: Minár
authors.forename: S
authors.initials: S
authors.lastname: Polesya
authors.forename: H
authors.initials: H
authors.lastname: Ebert
authors.forename: U
authors.initials: U
authors.lastname: Wurstbauer
authors.forename: M
authors.initials: M
authors.lastname: Hochstrasser
authors.forename: G
authors.initials: G
authors.lastname: Rossi
authors.forename: G
authors.initials: G
authors.lastname: Woltersdorf
authors.forename: W
authors.initials: W
authors.lastname: Wegscheider
authors.forename: C H
authors.initials: CH
authors.lastname: Back