The effect of grain boundary on the properties of La0.7Sr0.3MnO3 thin films prepared by chemical solution deposition

Polycrystalline and epitaxial La0.7Sr0.3MnO3 (LSMO) thin films are fabricated by chemical solution deposition (CSD) method on Si (1 0 0) and LaAlO3 (1 0 0) single crystal substrates, respectively. The transport and magnetic properties of the films are investigated. The magnetoresistance (MR) of LSMO films fabricated on Si (1 0 0) substrates is largely enhanced at low temperatures compared with that of LSMO films on LaAlO3 substrates. The difference of MR properties is discussed in terms of grain boundary (GB) effects.