Synthesis, tailored microstructures and 'colossal' magnetoresistance in oxide thin films

摘要

We have grown La(sub 1-x)Sr(sub x)MnO(sub 3) films, using both pulsed laser deposition and a polymeric sol-gel route. These two growth techniques result in different microstructures, but in both cases the texture (epitaxy or polycrystallinity) can be controlled by choice of substrates and growth conditions. The crystallography and microstructure of these films were studied using XRD and high- resolution TEM. The magnetic/magnetotransport properties of these films are discussed in context of their growth and microstructural parameters.