Study of microdefects in GaP and GaPZn single crystals grown by the liquid-encapsulation Czochralski method

Microdefects in undoped and zinc-doped GaP single crystals grown by the liquid-encapsulation Czochralski method have been studied by X-ray diffuse scattering. In undoped GaP single crystals, deviation from stoichiometry increases from the beginning to the end of an ingot. The ingot end is characterized by enhanced precipitation of excess gallium with formation of platelike microdefects. With an increase in their size, stress relaxation around microdefects begins to manifest itself. Doping with zinc leads to a significant change in the microdefect formation pattern.