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Monte Carlo Simulation of Magnetotransport Properties in \hbox {La}_{0.67}\hbox {Ca}_{0.33}\hbox {MnO}_{3} (FM) and \hbox {La}_{0.33}\hbox {Ca}_{0.67}\hbox {MnO}_{3} (AF) Thin Films

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5 Author(s)
Restrepo-Parra, E. ; PCM Comput. Applic., Univ. Nac. de Colombia Sede Manizales, Manizales, Colombia ; Bedoya-Hincapie, C.M. ; Orozco-Hernandez, G. ; Restrepo, J.
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Manganese perovskites have recently been the focus of renewed interest, due to the "colossal" magnetoresistance (CMR) effect and the coupled metal-insulator and magnetic transitions displayed at the spin-ordering temperature TC by some of these compounds. The essential ingredient of the CMR physics is not only the double-exchange interaction but also other competing interactions, such as ferromagnetic/antiferromagnetic superexchange interactions and charge/orbital ordering instabilities as well as their strong coupling with lattice distortion. In this work, a magnetotransport properties simulation of ferromagnetic (FM) La0.67Ca0.33MnO3 and antiferro magnetic (AF) La0.33Ca0.67MnO3 as a function of the temperature and the magnetic field is presented and discussed. Our study is addressed by using the Monte Carlo method on the basis of a Heisenberg model. Films thickness and external magnetic field influence on the resistivity and magnetoresistance (MR) was analyzed.

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Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 12 )