Resumo

BARCO RIOS, Héctor; ROJAS CALDERON, Edilberto  e  RESTREPO-PARRA, Elisabeth. Graphic Interface Implementation for Studying Magnetotransport Properties in Bilayers of Manganites Type Perovskite. ing.cienc. [online]. 2014, vol.10, n.20, pp.77-92. ISSN 1794-9165.

In this work, a study of some magnetotransport properties of manganite bilayers of ferromagnetic/Antiferromagnetic (FM/AF) La_2/3Ca_1/3MnO₃/ La_1/3Ca_2/3MnO₃ is presented. This study was carries out using the Monte Carlo method combined with Drude and Kronig-Penney models. For doing the simulations, graphic interfaces for allowing a suitable user interaction were developed. These interfaces also allow observing the simulation processes in real time. Results of resistivity and magnetoresistance as a function on the temperature and the external magnetic field were obtained. The resistivity depending on the temperature presented a minimum around the canted temperature and a maximum around the Curie temperature, T_C. A decrease in the resistivity and an increase in the magnetoresistance as the external magnetic field increases were observed. On the other hand, resistivity as a function on the temperature showed symmetry for positive and negative values of the external magnetic field. Moreover, at low temperatures, below T_C, the resistivity presented a splitting, producing two maxima and forming hysteresis loops.

Palavras-chave : resistivity; magnetoresistance; monte carlo; manganites; critical points.

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