Authors: R Masrour E K Hlil M Hamedoun A Benyoussef O Mounkachi L Bahmad
Publish Date: 2013/04/07
Volume: 26, Issue: 11, Pages: 3325-3329
Abstract
Selfconsistent ab initio calculations based on DFT Density Functional Theory approach and using the FLAPW Full potential Linear Augmented Plane Wave method are performed to investigate both electronic and magnetic properties of the MnO layers Polarized spin and spinorbit coupling are included in calculations within the framework of the antiferromagnetic state between two adjacent Mn layers Magnetic moment considered to lie along 110 axes are computed Obtained data from ab initio calculations are used as input for the high temperature series expansions HTSEs calculations to compute other magnetic parametersThe exchange integrals between the magnetic atoms Mn–Mn and Mn–O in the same layer and between the adjacent bilayers are given by using the mean field theory The antiferromagnetic energies of MnO layers are obtained The High Temperature Series Expansions HTSEs of the magnetic susceptibility on MnO antiferromagnetic layers through Heisenberg and XY models is given up to tenth order series in x=J Mn–Mn/k B T The reduced Néel temperature x N is obtained by HTSEs of the magnetic susceptibility and by using the Padé approximant method The critical exponent γ associated with the magnetic susceptibility is deduced
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