Magnetic anisotropy and anomalous transitions in TbMnO3 thin films
Applied Physics Letters，-0001，（）：
TbMnO3 thin films with different crystallographic orientations were deposited epitaxially on LaAlO3  and SrTiO3  single crystal substrates by using pulsed laser deposition. Magnetization measurements were performed along the , [_110], and  directions of the films. Obvious magnetic anisotropy and low temperature ferromagnetism were found. Transitions at T_10, 32, 120, and 125K along different directions are observed. The susceptibility anomalies, remarkably anisotropic, are discussed on the frame of the domain wall and strain-induced distortion. Particularly, the lattice mismatch and the anisotropic thermal expansion between the films and substrates are likely responsible for the distortion behaviors.
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