Abstract
In this paper, La0.9Sr0.1MnO3 thin films were grown epitaxially on (100), (110), and (111) LaAlO3 substrates, and the effects of film orientation on the structural, electrical and magnetic properties were investigated. Compared with the corresponding bulk material, all the films show metal-insulator transition around room temperature with a significantly enhanced Curie temperature. The in-plane compressive strain, coercivity, resistivity and magnetoresistance (MR) of the films increase in the order (100) < (110) < (111). While the paramagnetic-ferromagnetic transition temperature (TC) and metal-insulator transition temperature (TMI) of the films increase in the order (111) < (110) < (100). These results demonstrate that the lattice distortion of MnO6 octahedron can be tuned by controlling the film orientation, which can be an effective route to adjust the structural, electrical and magnetic properties of La0.9Sr0.1MnO3 films.
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