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Pis'ma v Zh. Èksper. Teoret. Fiz., 2015, Volume 102, Issue 3, Pages 192–201 (Mi jetpl4698)  

This article is cited in 6 scientific papers (total in 6 papers)

CONDENSED MATTER

Aging and memory effects in the nonequilibrium critical behavior of structurally disordered magnetic materials in the course of their evolution from the low-temperature initial state

V. V. Prudnikov, P. V. Prudnikov, E. A. Pospelov, P. N. Malyarenko

Omsk State University, pr. Mira 55, Omsk, 644077, Russia

Abstract: The Monte Carlo study of the nonequilibrium critical evolution of structurally disordered anisotropic magnetic materials from the low-temperature initial state with the reduced magnetization $m_0=1$ is performed within the broad range of spin densities, $p=1.0$, $0.95$, $0.8$, $0.6$, and $0.5$. It is shown that, in such systems, the pinning of domain walls by structural defects occurring when the evolution starts from the low-temperature state leads to significant changes in the nonequilibrium “aging” and “memory” effects in comparison to those characteristic of the “pure” system. As a result, in the long-term regime at times $t-t_w\gg t_w\gg1$, an anomalously strong slowing down in the correlation effects is revealed. It is shown that a decrease in the autocorrelation function with time occurs according to a power law typical of the critical relaxation of the magnetization in contrast to a usual scaling dependence. Eventually, the limiting value of the fluctuation-dissipation ratio X$^\infty$ for the structurally disordered systems with $p<1$ vanishes, whereas for the pure system, we have X$^\infty=0.784(5)$. The nonequilibrium critical “superaging” stage is found. This stage is characterized by the critical exponent $\mu=2.30(6)$ for weakly disordered systems and by $\mu=2.80(7)$ for the systems with strong disorder.

DOI: https://doi.org/10.7868/S0370274X15150072

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English version:
Journal of Experimental and Theoretical Physics Letters, 2015, 102:3, 167–175

Bibliographic databases:

Received: 14.05.2015
Revised: 29.06.2015

Citation: V. V. Prudnikov, P. V. Prudnikov, E. A. Pospelov, P. N. Malyarenko, “Aging and memory effects in the nonequilibrium critical behavior of structurally disordered magnetic materials in the course of their evolution from the low-temperature initial state”, Pis'ma v Zh. Èksper. Teoret. Fiz., 102:3 (2015), 192–201; JETP Letters, 102:3 (2015), 167–175

Citation in format AMSBIB
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\by V.~V.~Prudnikov, P.~V.~Prudnikov, E.~A.~Pospelov, P.~N.~Malyarenko
\paper Aging and memory effects in the nonequilibrium critical behavior of structurally disordered magnetic materials in the course of their evolution from the low-temperature initial state
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2015
\vol 102
\issue 3
\pages 192--201
\mathnet{http://mi.mathnet.ru/jetpl4698}
\crossref{https://doi.org/10.7868/S0370274X15150072}
\elib{http://elibrary.ru/item.asp?id=24324614}
\transl
\jour JETP Letters
\yr 2015
\vol 102
\issue 3
\pages 167--175
\crossref{https://doi.org/10.1134/S0021364015150072}
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    Citing articles on Google Scholar: Russian citations, English citations
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    This publication is cited in the following articles:
    1. V. V. Prudnikov, P. V. Prudnikov, M. V. Mamonova, Phys. Usp., 60:8 (2017), 762–797  mathnet  crossref  crossref  adsnasa  isi  elib
    2. V. V. Prudnikov, P. V. Prudnikov, P. N. Malyarenko, J. Exp. Theor. Phys., 125:6 (2017), 1102–1115  crossref  isi  scopus
    3. V. V. Prudnikov, P. V. Prudnikov, I. S. Popov, J. Exp. Theor. Phys., 126:3 (2018), 368–382  crossref  isi  scopus
    4. V. V. Prudnikov, P. V. Prudnikov, P. N. Malyarenko, Phys. Solid State, 60:6 (2018), 1098–1110  crossref  isi  scopus
    5. Popov I.S. Popova A.P. Prudnikov P.V. Prudnikov V.V., International Conference on Computer Simulation in Physics and Beyond, Journal of Physics Conference Series, 1163, ed. Shchur L., IOP Publishing Ltd, 2019  crossref  isi
    6. Prudnikov V.V. Prudnikov P.V. Malyarenko P.N., International Conference on Computer Simulation in Physics and Beyond, Journal of Physics Conference Series, 1163, ed. Shchur L., IOP Publishing Ltd, 2019  crossref  isi
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