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Theoretical models for a complex magnetic system: the case of CeNi1-xCux

Abstract: Special features in the phase diagram and in the low temperature hysteresis cycles have been experimentally observed in the complex CeNi1-xCux system. We present also here theoretical approaches, based firstly on a Kondo lattice model which describes the coexistence between a spin glass or a cluster glass state, the Kondo regime and the ferromagnetic ordering. The second model is a Monte Carlo simulation on a 3D lattice with clusters and random anisotropy and reproduces the existence of steps in the magnetizations cycles at very low temperatures. The theoretical results are compared with the experimental data of the very complex magnetic behaviour of CeNi1-xCux alloys. In particular, we can account for the existence of a cluster spin glass state which changes continuously into an inhomogeneous ferromagnetic phase at very low temperatures..

 Autoría: Marcano N., Magalhaes S.G., Coqblin B., Gómez Sal J.C., Espeso J.I., Zimmer F.M., Iglesias J.R.,

 Fuente: Journal of Physics: Conference Series, 2010, 200, 012111

 Editorial: Institute of Physics

 Año de publicación: 2010

 Nº de páginas: 5

 Tipo de publicación: Artículo de Revista

 DOI: 10.1088/1742-6596/200/1/012111

 ISSN: 1742-6588,1742-6596

 Proyecto español: MAT 2003-06815

 Url de la publicación: https://doi.org/10.1088/1742-6596/200/1/012111

Autoría

MARCANO, N.

MAGALHAES, S. G.

COQBLIN, B.

IGLESIAS, J. R.