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Title: | Monte Carlo simulations of magnetic order in Fe-doped manganites |
Authors: | Alonso, J. L.; Gutiérrez, J.; Barandiarán, J.M.; Bermejo, Francisco Javier CSIC ORCID; Brey, Luis CSIC ORCID | Keywords: | Doped manganites Monte Carlo Micromagnetism |
Issue Date: | 1-Feb-2008 | Publisher: | Elsevier | Citation: | Physica B: Condensed Matter 403(2-3): 394–397 (2008) | Abstract: | The effect of Fe doping on the magnetic properties of La(0.7)Pb(0.3)Mn(1-x)FexO3 (x = 0, 0.05, 0.1, 0.15 and 0.2) manganites is studied by the Monte Carlo simulation technique. As a first approximation, by means of a simple Heisenberg Hamiltonian, experimental normalized magnetizations at low temperatures have been reproduced for concentrations of Fe (x<0.2), but the calculated order temperatures show a large deviation from the measured ones. This shortcoming can be corrected by using a one electron effective hopping semi-classical Hamiltonian, with a simplified expression for the kinetic energy of the free electrons, which also avoids time-consuming diagonalizations. | Description: | 4 pages, 3 figures.-- Available online on Aug 15, 2007.-- Issue title: Proceedings of the Sixth International Symposium on Hysteresis Modeling and Micromagnetics (Naples, Italy Jun 4-6, 2007). | Publisher version (URL): | http://dx.doi.org/10.1016/j.physb.2007.08.058 | URI: | http://hdl.handle.net/10261/11082 | DOI: | 10.1016/j.physb.2007.08.058 | ISSN: | 0921-4526 |
Appears in Collections: | (ICMM) Artículos (CFMAC-IEM) Artículos |
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