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Session Q14 - DCMP: SEMICONDUCTORS: MAGNETISM
Mixed session, Friday morning, March 24, 8:00
Room J4, San Jose Convention Center
The 3d transition metal ions (TMI) substituting for the cations in the tetrahedrally coordinated zincblende II-VI semiconductors display a localized mode above the reststrahlen when introduced in dilute concentrations. G. C. La Rocca, A. K. Ramdas and S. Rodriguez, Solid State Commun. 91, 785 (1994). The local mode observed in the infrared displays a characteristic dependence on the isotopic mass of the TMI with each isotopic component exhibiting an intensity consistent with its natural abundance. In the wurtzite II-VIs, the local mode undergoes a splitting into two components, one polarized along the optic axis and the other normal to it. The local mode frequency shows a striking non-monotonic dependence on the number of 3d electrons of the TMI. ^* Supported by National Science Foundation Grant No. DMR93-03186. \vspace*-0.125in