OPTICALLY DETECTED MAGNETIC-RESONANCE INVESTIGATIONS ON TITANIUM AND VANADIUM IONS IN CDTE

The transition metal ions titanium and vanadium in CdTe are studied by optical absorption, electron paramagnetic resonance (EPR), magnetic c ircular dichroism (MCD) and optically detected magnetic resonance (ODM R) spectroscopy. Titanium is observed in two different charge states, Ti2+ (3d(2)) and Ti3+ (3d(1)) by EPR. Absorption measurements however show only the (3)A(2)-->T-3(1)(P-3) and (3)A(2)-->(1)E(D-1) infernal t ransitions of Ti2+. This assignment is confirmed by MCD and ODMR measu rements. For vanadium-doped CdTe only the V3+ charge state is observed in EPR. In absorption two pronounced absorption bands are seen which are attributed to internal transitions of V3+.