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.
Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/Ga-Mn-As Interfaces / F., Maccherozzi; M., Sperl; G., Panaccione; J., Minar; S., Polesya; H., Ebert; U., Wurstbauer; M., Hochstrasser; Rossi, Giorgio; G., Woltersdorf; W., Wegscheider; AND C. H., Back. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 101:26(2008), pp. 267201-267204. [10.1103/PhysRevLett.101.267201]
Evidence for a Magnetic Proximity Effect up to Room Temperature at Fe/Ga-Mn-As Interfaces
ROSSI, Giorgio;
2008
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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