Abstract
In this work, magnetic and magnetotransport properties of ferromagnetic (FM)/antiferromagnetic (AF) (La2/3Ca1/3MnO3/La1/3Ca2/3MnO3)n (n = 1, 3, 5, 8) manganite multilayers using the standard Monte Carlo method were studied. Simulations of a three-dimensional classical Heisenberg model implemented with a single spin-flip Metropolis dynamics were performed. The Hamiltonian included four different superexchange interactions, according with the two different types of ions Mn3+ and Mn4+. Also, the orbital differences accounting for the Mn3+ ions were considered. Likewise, the Hamiltonian included terms dealing with magnetocrystalline anisotropy and the influence of an external magnetic field. Samples were simulated with dimensions L 2(d FM + d AF), where L stands for the lateral dimension along which periodic boundary conditions were implemented and d F M and d A F stand for the thicknesses of FM and AF layers, respectively, with free boundary conditions. In particular, low-temperature results reveal the behavior of the magnetoresistance depending of the thickness and the number of bilayers.
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Authors gratefully acknowledge the financial support of the Dirección Nacional de Investigaciones of the National University during the course of this research under project 10709 “Grupo PCM Computational Applications.”
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Restrepo-Parra, E., Londoño-Navarro, J. & Arbeláez, O.D. Simulation of Magnetotransport Properties of Ferromagnetic/Antiferromagnetic Multilayers of Manganites. J Supercond Nov Magn 28, 151–156 (2015). https://doi.org/10.1007/s10948-014-2827-2
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DOI: https://doi.org/10.1007/s10948-014-2827-2