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Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/(Ga,Mn)As Interfaces (Articolo in rivista)

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Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/(Ga,Mn)As Interfaces (Articolo in rivista) (literal)

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Maccherozzi, F; Sperl, M; Panaccione, G; Minar, J; Polesya, S; Ebert, H; Wurstbauer, U; Hochstrasser, M; Rossi, G; Woltersdorf, G; Wegscheider, W; Back, CH (2008)
Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/(Ga,Mn)As Interfaces
in Physical review letters (Print); American Physical Society (APS), College Pk (Stati Uniti d'America)
(literal)

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Maccherozzi, F; Sperl, M; Panaccione, G; Minar, J; Polesya, S; Ebert, H; Wurstbauer, U; Hochstrasser, M; Rossi, G; Woltersdorf, G; Wegscheider, W; Back, CH (literal)

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1) Results of this publicatiion have been Selected as viewpoint in Physics-PRL, Physics 1, 43 (2008). 2) A preliminary US patent has been deposited , Brevetto US Pat. 61/133,344, filed in Aug 2008. \"Induced Ferromagnetic order in Diluted Magnetic Semiconductors\", CNR-INFM 40% , Uni Regensburg 40%, ETH-Zurich 20%. (literal)

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Maccherozzi, F.; Panaccione, G.; Rossi, G. INFM CNR, Lab NazTASC, I-34012 Trieste, Italy; Sperl, M.; Wurstbauer, U.; Woltersdorf, G.; Wegscheider, W.; Back, C. H. Univ Regensburg, Inst Expt Phys, D-93040 Regensburg, Germany; Hochstrasser, M. ETH Honggerberg, Festkorperphys Lab, CH-8093 Zurich, Switzerland; Rossi. G. Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy; Minar, J.; Polesya, S.; Ebert, H., Univ Munich, Dept Chem, Munich, Germany (literal)

Titolo

Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/(Ga,Mn)As Interfaces (literal)

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. (literal)

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