Magnetoresistance and phase separation in thin films of moderately Sr-doped manganites

Abstract Magnetoresistance and ferromagnetic resonance have been studied in La 0.775 Sr 0.225 MnO 3 thin films grown on SrTiO 3 (0 0 1) substrates. It is shown that, in contrast to the properties of the bulk samples of moderately Sr-doped manganites, a mixed-phase magnetic state is characteristic of the films at low temperatures. Being complementary to the data on thin films of other manganite systems, our results suggest that a complex phase separation phenomenon is an intrinsic property of the majority of manganite thin films.