Magnetic interaction between GaMnAs layers via spin-polarized quasi-two-dimensional hole gas: Monte Carlo simulation.

The magnetic order resulting from an indirect exchange between magnetic moments in the metallic phase of a Ga[SUB1-x]Mn[SUBx]As bilayered structure is studied via Monte Carlo simulation. The coupling mechanism involves a perturbative calculation in second order of the interaction between the magnetic moments and carriers (holes). We take into account a possible polarization of the hole gas establishing, thus self-consistency between the magnetic order and the electronic structure. It leads to a ferromagnetic order even in the case of thin layers. This fact is analyzed in terms of the inter-and intralayer interactions. [ABSTRACT FROM AUTHOR]