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

被引:6
|
作者
Marcano, N. [1 ]
Magalhaes, S. G. [2 ]
Coqblin, B. [3 ]
Gomez Sal, J. C. [4 ]
Espeso, J. I. [4 ]
Zimmer, F. M. [5 ]
Iglesias, J. R. [6 ]
机构
[1] Univ Zaragoza, CSIC, ICMA, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain
[2] Univ Fed Santa Maria, BR-97105900 Santa Maria, RS, Brazil
[3] Univ Paris 11, CNRS UMR 8502, LPS, F-91405 Orsay, France
[4] Univ Cantabria, Dept CITIMAC, E-39005 Santander, Spain
[5] Univ Estado Santa Catarina, Dept Fis, BR-89223100 Joinville, SC, Brazil
[6] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil
来源
INTERNATIONAL CONFERENCE ON MAGNETISM (ICM 2009) | 2010年 / 200卷
关键词
FERMI-LIQUID BEHAVIOR; SPIN-GLASS; KONDO-LATTICE; FERROMAGNET; METALS;
D O I
10.1088/1742-6596/200/1/012111
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页数:4
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