Reentrant spin-glass transition in a dilute Heisenberg ferromagnet

We perform a large-scale Monte Carlo simulation of a dilute ferromagnetic Heisenberg model with antiferromagnetic next-nearest neighbor interactions. We find that the model reproduces a reentrant spin-glass (RSG) transition. That is, as the temperature is decreased, the magnetization M once increase...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2007-03, Vol.310 (2), p.e515-e517
Main Authors: Matsubara, F., Niidera, S.
Format: Article
Language:English
Subjects:
Dilute magnet
Reentrant spin glass
Spin glass
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Summary:We perform a large-scale Monte Carlo simulation of a dilute ferromagnetic Heisenberg model with antiferromagnetic next-nearest neighbor interactions. We find that the model reproduces a reentrant spin-glass (RSG) transition. That is, as the temperature is decreased, the magnetization M once increases rapidly below a certain temperature, reaches a maximum value, and then disappears at some lower temperature. The low-temperature phase is suggested to be a spin-glass (SG) phase that is characterized by ferromagnetic clusters. We present a possible mechanism responsible for the RSG transition.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.10.644