Ferromagnetism in (In,Mn)As alloy thin films grown by metalorganic vapor phase epitaxy

Details Ferromagnetism in (In,Mn)As alloy thin films grown by metalorganic vapor phase epitaxy Ferromagnetism in (In,Mn)As alloy thin films grown by metalorganic vapor phase epitaxy

2003-10-06

arxiv.org/abs/cond-mat/0310104v1

Physics

Condensed Matter

Materials Science

In press in Appl. Surf. Sci

Scientific paper

10.1016/S0169-4332(03)00873-0

Ferromagnetic properties of In1-xMnxAs thin films were investigated. Room temperature ferromagnetic order was observed in nominally single-phase films with x = 0.01-0.10. Magnetization measurements indicated that these In1-xMnxAs samples had a Curie temperature of 333 K. The Curie temperature was independent of Mn concentration. The temperature dependent magnetization along with the magnitude of the saturation magnetization and microstructural data indicate that the source of the high-temperature ferromagnetism in single-phase films is not attributable to MnAs nanoprecipitates. The high transition temperature is attributed to the presence of near neighbor Mn pairs.

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