A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi(1-x)FexSb

Details A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi(1-x)FexSb A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi(1-x)FexSb

2006-09-02

arxiv.org/abs/cond-mat/0609042v1

Physics

Condensed Matter

Materials Science

JMMM accepted

Scientific paper

Half-Heusler compounds with 18 valence electrons are semi-conducting. It will be shown that doping with electrons results in half-metallic ferromagnets, similar to the case of diluted semi-conductors. CoTiSb is known to be a semi-conducting Half-Heusler compound. Doping by Fe is expected to result in ferromagnetic order. It was found that Ti can be replaced by up to about 10% Fe while its crystal structure still remains C1b, which was proved by X-ray powder diffraction. SQUID magnetometry revealed a magnetic moment of 0.32 mB per unit cell at 5K.

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