Theoretical study of ferromagnetism in (VN)1/(GaN)3 superlattice
Keywords:
Magnetic properties, Superlattices, LAPW, GaNAbstract
Using first principles calculations by means theLinearized Augmented Plane Wave (LAPW)method the structural, electronic and magneticproperties of (VN)1/(GaN)3 superlattice inwurtzite structure have been investigated. Theexchange and correlation effects were treatedusing the Generalized Gradient Approximation(GGA) with the Perdew, Burke and Ernzerhofparameterization (PBE). By total energycalculations it was found that ferromagneticstate (FM) is energetically more stable thannonmagnetic (NM) and antiferromagnetic (AFM)states. The ferromagnetism is presented althoughthat vanadium atom is not a magnetic atom. Inthe equilibrium volume, a total moment magneticof 2 μB/supercell was found in the ferromagneticstate. Also, it was found that the system possessesbehaviour electronic type half-metallic, whereconduction electrons conduction presents 100%of spin polarization in the Fermi level. This makesthis superlattice potentially useful for spin injectioninto ZnO or the same GaN.
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References
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