MAGNETIC-PROPERTIES OF CD1-XMNXTE GROWN BY MOLECULAR-BEAM EPITAXY

Temperature dependent magnetization measurements have been performed o n both thick Cd1-xMnxTe layers and a CdTe/Cd1-xMnxTe superlattice grow n by molecular beam epitaxy (MBE). The general behaviour of the thick layers is similar to bulk-grown material, with a spin-glass state bein g formed at low temperatures, but the magnitude of the high-temperatur e susceptibilities differs significantly. This may be due to structura l differences in the material grown by different methods. The layer wi th the highest Mn fraction of x = 0.70 shows antiferromagnetic behavio ur with a Neel temperature of 48 K. The superlattice structure contain ing 100 angstrom thick layers of Cd0.55Mn0.45Te also showed a spin-gla ss transition, but had an enhanced paramagnetic contribution to the su sceptibility at low temperatures. This could be caused by the reductio n in dimensionality or by an interface effect.