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Science 11 February 2000:
Vol. 287. no. 5455, pp. 1019 - 1022
DOI: 10.1126/science.287.5455.1019
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Reports
Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors
T. Dietl,
12*
H. Ohno,
1*
F. Matsukura,
1
J. Cibert,
3
D. Ferrand
3
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 (TC) 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 TC of
Ga1 xMnxAs
and that of its II-VI counterpart
Zn1xMnxTe and is used to predict materials with TC
exceeding room temperature, an important step toward semiconductor
electronics that use both charge and spin.
1 Research Institute of Electrical
Communication, Tohoku University, Katahira 2-1-1, Sendai 980-8577, Japan.
2 Institute of Physics and College of
Science, Polish Academy of Sciences, al. Lotników 32/46, PL-02668
Warsaw, Poland.
3 Laboratoire de Spectrométrie
Physique, Université Joseph Fourier Grenoble 1-CNRS (UMR 5588),
F-38402 Saint Martin d'Hères Cedex, France.
*
To whom correspondence should be addressed. E-mail:
dietl{at}ifpan.edu.pl; ohno{at}riec.tohoku.ac.jp
Read the Full Text
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