The effect of grain boundary on the properties of La_(0.7)Sr_(0.3)MnO_3 thin films prepared by chemical solution deposition

摘要

Polycrystalline and epitaxial La_(0.7)Sr_(0.3)MnO_3 (LSMO) thin films are fabricated by chemical solution deposition (CSD) method on Si (1 0 0) and LaAlO_3 (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 LaAlO_3 substrates. The difference of MR properties is discussed in terms of grain boundary (GB) effects.