A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi1-xFexSb

Balke, Benjamin; Kroth, Kristian; Fecher, Gerhard H.; Felser, Claudia

doi:10.1063/1.2837884

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A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi_1-xFe_xSb

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Balke, B., Kroth, K., Fecher, G. H., & Felser, C. (2008). A new diluted magnetic semiconductor: The half-metallic ferromagnet CoTi_1-xFe_xSb. Journal of Applied Physics, 103(7): 07D115, pp. 1-3. doi:10.1063/1.2837884.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-8A25-8

Abstract

C1(b) compounds with 18 valence electrons are semiconducting. It will be shown that doping with electrons results in half-metallic ferromagnets, similar to the case of diluted semiconductors. CoTiSb is known to be a semiconducting C1(b) 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 C1(b), which was proved by x-ray powder diffraction. Superconducting quantum interference device magnetometry revealed a magnetic moment of 0.32 mu(B)/unit cell at 5 K.