Diluted magnetic semiconductors interactions

Nanoparticles of dilute magnetic semiconductors have also been studied by NMR. Here one important question is whether the magnetic ion is incorporated into the NC or resides on the surface. The 113Cd MAS-NMR of NCs of Cd0.991Co0.009S with diameters from 3.5 to 29.5 nm showed peaks shifted by electron hyperfine interactions from next-nearest neighbor Co2+ ions, and by comparison with results from bulk samples that were discussed in Sect. 3.5 it was concluded that Co2+ ions occupied Cd2+ sites and were distributed homogeneously ... 

RKKY interactions were first considered on an atomic scale, where the oscillation period is on an A scale. In nanostructures, the fast oscillations do not average to zero but increase with the size of the embedded clusters or nanoparticles. However, the increase is less pronounced than that of magnetostatic interactions, and for particles sizes larger than about 1 nm, the magnetostatic interactions become dominant [27, 29], In semiconductors and semimetals, such as Sb, the low density of carriers means that kF is small, and the period of the oscillations is nanoscale [16, 28], This contributes to the complexity of the physics of diluted magnetic semiconductors [30, 31]. 

Kacman, P. (2001) Spin interactions in diluted magnetic semiconductors and magnetic semiconductor structures. Semiconductor Science and Technology, 16, R25. 

Magneto-optical properties of doped materials. Paramagnetic dopants can exhibit exchange interactions with the carriers inside the semiconductor host. Such materials are referred to as dilute magnetic... 

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