Abstract
The ab initio investigation of the magnetic ordering in digital alloys consisting of monolayers of 3dtransition metals Ti, V, Cr, Mn, Fe, Co, and Ni introduced into the Si, Ge, and Si0.5Ge0.5 semiconductor hosts is reported. The calculations of the parameters of the exchange interactions and totalenergy calcula� tions indicate that the ferromagnetic order appears only in the manganese monolayers, whereas the antifer� romagnetic order is more probable in V, Cr, and Fe monolayers, and Ti, Co, and Ni monolayers are nonmag� netic. The stability of the ferromagnetic phase in digital alloys containing manganese monolayers has been analyzed using the calculations of magnon spectra.
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