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Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors

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Science  11 Feb 2000:
Vol. 287, Issue 5455, pp. 1019-1022
DOI: 10.1126/science.287.5455.1019

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Abstract

Ferromagnetism in manganese compound semiconductors not only opens prospects for tailoring magnetic and spin-related phenomena in semiconductors with a precision specific to III-V compounds but also addresses a question about the origin of the magnetic interactions that lead to a Curie temperature (T C) as high as 110 K for a manganese concentration of just 5%. Zener's model of ferromagnetism, originally proposed for transition metals in 1950, can explain T C of Ga1− xMnxAs and that of its II-VI counterpart Zn1− xMnxTe and is used to predict materials with T Cexceeding room temperature, an important step toward semiconductor electronics that use both charge and spin.

  • * To whom correspondence should be addressed. E-mail: dietl{at}ifpan.edu.pl; ohno{at}riec.tohoku.ac.jp

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