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. 2008 Dec 31;101(26):267201.
doi: 10.1103/PhysRevLett.101.267201.

Evidence for a magnetic proximity effect up to room temperature at Fe/(Ga, Mn)As interfaces

F Maccherozzi  1 , M Sperl, G Panaccione, J Minár, S Polesya, H Ebert, U Wurstbauer, M Hochstrasser, G Rossi, G Woltersdorf, W Wegscheider, C H Back
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Free article

Evidence for a magnetic proximity effect up to room temperature at Fe/(Ga, Mn)As interfaces

F Maccherozzi et al. Phys Rev Lett. .
Free article

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.

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