Growth and properties of ferromagnetic In(1-x)Mn(x)Sb alloys

Details Growth and properties of ferromagnetic In(1-x)Mn(x)Sb alloys Growth and properties of ferromagnetic In(1-x)Mn(x)Sb alloys

2003-07-01

arxiv.org/abs/cond-mat/0307032v1

Physics

Condensed Matter

Materials Science

Invited talk at 11th International Conference on Narrow Gap Semiconductors, Buffalo, New York, U.S.A., June 16 - 20, 2003

Scientific paper

10.1016/j.physe.2003.08.028

We discuss a new narrow-gap ferromagnetic (FM) semiconductor alloy, In(1-x)Mn(x)Sb, and its growth by low-temperature molecular-beam epitaxy. The magnetic properties were investigated by direct magnetization measurements, electrical transport, magnetic circular dichroism, and the magneto-optical Kerr effect. These data clearly indicate that In(1-x)Mn(x)Sb possesses all the attributes of a system with carrier-mediated FM interactions, including well-defined hysteresis loops, a cusp in the temperature dependence of the resistivity, strong negative magnetoresistance, and a large anomalous Hall effect. The Curie temperatures in samples investigated thus far range up to 8.5 K, which are consistent with a mean-field-theory simulation of the carrier-induced ferromagnetism based on the 8-band effective band-orbital method.

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