Density functional calculations of hole induced long ranged ferromagnetic ordering in Mn doped Cd28Se28 nanocluster

Ghosh, S.; Sanyal, B.; Das, G. P.
February 2010
Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p052506
Academic Journal
We have investigated the possibility of long ranged ferromagnetic ordering in Mn doped Cd28Se28 nanocluster using density functional approach. Following the band repulsion theory we have explained that magnetic coupling between Mn atoms substituted in Cd sites is antiferromagnetic and short ranged. However, long ranged ferromagnetic coupling is possible via additional hole doping which leads to the spin splitting of the valence band. In this class of magnetic nanoclusters, additional hole doping induces spin polarization of host states at large distance. This property can lead to molecular magnets with tunable magnetic properties.


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