Abstract
We have studied the magnetic properties of Zn 1− x Mn x Se in the case of x=0.5, 0.25 by using a FLAPW method with super-cells. The anti-ferromagnetic states are stable upon electron and hole-doping up to 0.4 per Zn 0.5Mn 0.5Se. Because the anti-ferromagnetic super-exchange interaction in Mn–Se–Mn direct bonds overcome the double exchange interaction caused by the mobile Mn–3d electrons and holes. In order to stabilize the ferromagnetic states, we have proposed a new guideline to reduce the anti-ferromagnetic Mn–Se–Mn interaction with reducing the number of the Mn–Se–Mn bonds by choosing the special superlattice configuration for Zn 0.75Mn 0.25Se. We proposed the materials design to fabricate the ferromagnetic Zn 1− x Mn x Se superlattice based upon the calculation.
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