Evidence for a magnetic proximity effect up to room temperature at Fe/(Ga, Mn)As interfaces.
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.
Maccherozzi
F
F
Laboratorio Nazionale TASC, INFM-CNR, in Area Science Park, S.S. 14, Km 163.5, I-34012, Trieste, Italy.
Sperl
M
M
Panaccione
G
G
Minár
J
J
Polesya
S
S
Ebert
H
H
Wurstbauer
U
U
Hochstrasser
M
M
Rossi
G
G
Woltersdorf
G
G
Wegscheider
W
W
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