Magneto-optic study of Ni-based diluted magnetic semiconductors

After establishing the usefulness of ion implantation to synthesize diluted magnetic semiconductors (DMSs) for the case of Zn1-xCoxTe, we apply this technique to obtain Ni-based DMS which has not been reported before. Ni ions are implanted into a ZnTe film with acceleration energies from 30 to 390 keV to achieve a Ni density of 3 x 10(20)/cm(3). Magnetic circular dichroism (MCD) spectra show that the Ni ions substitute Zn ions and induce sizable Zeeman splittings of the optical transitions. Analyses of the MCD spectra show that the p-d exchange in Zn1-xNixTe is antiferromagnetic. (C) 1998 American Institute of Physics.