Structure, electrical and magnetic properties of thin films of La_(1-x)M_xMnO_3 on Si

摘要

Thin films of lanthanum manganates doped with Ca~(2+), Sr~(2+), Ba~(2+) and Pb~(2+) have been deposited on Si(100) substrate and their electrical and magnetic properties were discussed with respect to the composition, structure and nature of the dopant. Buffer layers of YSZ and La_(0.8)Al_(0.2)O_3 were employed and their effect on the materials was studied. Interesting magnetotransport properties were found in some of the films, where there is a large difference between the insulator-metal transition temperature and a ferromagnetic transiton temperature.