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We present a study of anisotropy of transport and magnetic properties inLa_{1-x}Ca_{x}MnO_{3} (x \approx 1/3) film prepared by pulsed-laser depositiononto a LaAlO_{3} sunstrate. We found a non-monotonic dependence ofmagnetoresistance (MR) on magnetic field H for both H perpendicular andparallel to the film plane but perpendicular to the current. This rathercomplex behavior of MR manifests itself at low temperatures, far below theCurie temperature. Two main sources of MR anisotropy have been considered inthe explanantion of the results: (1) the existence of preferential directionsof magnetization (due to strains stemming from the lattice film-substratemismatch or other reasons); (2) dependence of resistance on the angle betweencurrent and the magnetization, which is inherent in ferromagnets.

Transport and Magnetic Anisotropy in CMR Thin Film La1xCaxMnO3 (x ≈ 1/3) Induced by a Film–Substrate Interaction