Abstract
An A-site ordered perovskite manganite LaBaMn 2O 6− δ ( δ ≅ 0.5) film was fabricated by means of an excimer laser assisted metal organic deposition (ELAMOD) method and epitaxially grown on a SrTiO 3(0 0 1) substrate. The LaBaMn 2O 6− δ film was crystallized in [0 1 0]- and [0 0 1]-oriented domains that were confirmed by X-ray diffraction. The A-site ordered structure formed at 500 °C under KrF laser irradiation at a laser fluence of 140 mJ/cm 2 for 60 min in an Ar flow. A LaBaMn 2O 6 film was obtained by oxygen annealing of the as-prepared LaBaMn 2O 6− δ film at 500 °C for 3 h. The magnetization for the LaBaMn 2O 6− δ film showed a ferromagnetic transition at 330 K, and the electrical resistivity exhibited a semiconductor-metal transition at 330 K. The magnetoresistance (MR) effect was observed below 370 K, and the MR efficiency was up to 135% at 300 K under 9 T. The ELAMOD process is expected to serve as a new key technique for the fabrication of A-site ordered perovskite manganite thin films.
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