Fast neutron-induced defects in undoped and iron-doped indium phosphide

Undoped and iron-doped InP samples have been investigated by conventional electron paramagnetic resonance measurements before and after fast neutron irradiations. Besides the expected anion antisite P/sub In/ defect, they reveal the presence of a broad spectrum that could be ascribed to an anion vacancy V/sub p/ on the basis of detailed linewidth and g-shift scalings of the resonance parameters of already identified intrinsic defects in GaP and InP. The irradiated InP:Fe sample shows both the nearest and next-nearest Fe/sub In/-In/sub i/ pairs