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Condensed Matter > Disordered Systems and Neural Networks

arXiv:1912.02514 (cond-mat)
[Submitted on 5 Dec 2019]

Title:Cluster size effects in the magnetic properties of Fe$_p$-Al$_{q=1-p}$ alloys

Authors:João B. Santos-Filho, Alan V. Santos, Tatiana S. de Araujo Batista, João A. Plascak
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Abstract:A spin-1/2 Ising model, defined in the body centered cubic lattice, is used to describe some of the thermodynamic properties of Fe$_p$-Al$_q$ alloys, with $p+q=1$. The model assumes, besides the nearest-neighbor exchange coupling, the existence of further next-nearest-neighbor superexchange interactions, where the latter ones depend on the aluminum atoms cluster size. The Ising system so considered is studied by employing Monte Carlo simulations, using a hybrid algorithm consisting of one single-spin Metropolis move together with one single-cluster Wolff algorithm allied, in addition, with single histograms procedures and finite-size scaling techniques. Quite good fits to the experimental results of the ordering critical temperature, as a function of Al concentration in the range $0\le q<0.7$, are obtained and compared to more recent theoretical approaches done on the same alloys.
Comments: 9 pages, 5 figures
Subjects: Disordered Systems and Neural Networks (cond-mat.dis-nn); Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1912.02514 [cond-mat.dis-nn]
  (or arXiv:1912.02514v1 [cond-mat.dis-nn] for this version)
  https://doi.org/10.48550/arXiv.1912.02514
Related DOI: https://doi.org/10.1016/j.jmmm.2019.166262

Submission history

From: Joao Batista Dos Santos-Filho [view email]
[v1] Thu, 5 Dec 2019 11:41:04 UTC (359 KB)
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