Alejandro, G., L. B. Steren, H. Pastoriza, D. Vega, M. Granada, J. C. Rojas Sánchez, M. Sirena, and B. Alascio. "Magnetoresistance effect in (La, Sr)MnO_3 bicrystalline films." Journal of Physics: Condensed Matter 22, no. 34 (2010): 346007.
Abstract: The angular dependence of the magnetoresistance effect has been measured on bicrystalline La 0.75 Sr 0.25 MnO 3 films. The measurements have been performed on an electronically lithographed Wheatstone bridge. The study of the angular dependence of both the magnetoresistance and the resistance of single-crystalline and grain-boundary regions of the samples allowed us to isolate two contributions of low-field magnetoresistance in manganites. One of them is associated with the spinâ€“orbit effect, i.e.Â the anisotropic magnetoresistance of ferromagnetic compounds, and the other one is related to spin-disorder regions at the grain boundary. Complementary x-ray diffraction, ferromagnetic resonance and low temperature magnetization experiments contribute to the characterization of the magnetic anisotropy of the samples and the general comprehension of the problem.