Epitaxial Growth of La₁/₃Sr₂/₃FeO₃ thin films by laser ablation

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We report on the synthesis of high quality La₁/₃Sr₂/₃FeO₃ (LSFO) thin films using the pulsed laser deposition technique on both SrTiO₃ (STO) and LaAlO₃ (LAO) substrates (100)-oriented. From X-Ray diffraction (XRD) studies, we find that the films have an out-of-plane lattice parameter around 0.3865nm, almost independent of the substrate (i.e. the nature of the strains). The transport properties reveal that, while LSFO films deposited on STO exhibit an anomaly in the resistivity vs temperature at 180K (corresponding to the charge-ordered transition and associated with a transition from a paramagnetic to an antiferromagnetic state), the films grown on LAO display a very small magnetoresistance behavior and present an hysteresis around 270K under the application of a 4T magnetic field. The changes in transport properties between both substrates are discussed and compared with the corresponding single crystals.