Phys. Rev. B 59, 9818–9821 (1999)Interlayer coupling in ferromagnetic semiconductor superlatticesReceived 20 January 1999; published in the issue dated 15 April 1999 We develop a mean-field theory of carrier-induced ferromagnetism in diluted magnetic semiconductors. Our approach represents an improvement over standard Ruderman-Kittel-Kesuya-Yosida model allowing spatial inhomogeneity of the system, free-carrier spin polarization, finite temperature, and free-carrier exchange and correlation to be accounted for self-consistently. As an example, we calculate the electronic structure of a MnxGa1-xAs/GaAs superlattice with alternating ferromagnetic and paramagnetic layers and demonstrate the possibility of semiconductor magnetoresistance systems with designed properties. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.59.9818
DOI:
10.1103/PhysRevB.59.9818
PACS:
75.50.Pp, 75.70.Cn, 73.61.Ey, 75.70.Pa
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