MAGNETIC AND ELECTRICAL-PROPERTIES OF THE FERRIMAGNET DY(0.67)CA(0.30)MNO(3+ -)D/

Films of the compound Dy0.67Ca0.30MnO3+/-d have been prepared using mo lecular beam epitaxy. Dy0.67Ca0.30MnO3+/-d has been found to be an ins ulator with an energy gap of 140 meV. It exhibits an apparent diamagne tic response at low temperature when cooled in a magnetic field, but i s actually a ferrimagnet. The apparent diamagnetism is a consequence o f the more rapid growth with decreasing temperature of the magnetizati on of the sublattice antialigned with the field relative to that align ed with the field. At low temperatures there is a modest magnetoresist ance.