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APPLIED PHYSICS LETTERS
Volume 89, Issue 19, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2370751
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The authors suggest geometrical arrangements in (Zn,Co)O multilayered structures which maximize the spin polarization densities. The theoretical argument is supported by electronic structure calculations based on a two-band effective mass model adapted to describe these systems and solved self-consistently with the aid of Poisson's equation. The exchange correlation, the strain terms, and the magnetic interactions are all included in the Hamiltonian. From their results a set of parameters can be determined to maximize the presence of spin-polarized charge distributions inside or outside the nonmagnetic layers, which enhances the transition temperature to ferromagnetism or the carrier mobility in the system.
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