Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields

We study the irreversible growth of magnetic thin films under the influence of spatially periodic fields by means of extensive Monte Carlo simulations. We find first-order pseudo-phase transitions that separate a dynamically disordered phase from a dynamically ordered phase. By analogy with time-dep...

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Autores principales: Loscar, Ernesto Selim, Candia, Julián Marcelo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Física
Thin films
Phase transitions
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104492
http://hdl.handle.net/11336/7484
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-104492
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Thin films
Phase transitions
spellingShingle Física
Thin films
Phase transitions
Loscar, Ernesto Selim
Candia, Julián Marcelo
Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
topic_facet Física
Thin films
Phase transitions
description We study the irreversible growth of magnetic thin films under the influence of spatially periodic fields by means of extensive Monte Carlo simulations. We find first-order pseudo-phase transitions that separate a dynamically disordered phase from a dynamically ordered phase. By analogy with time-dependent oscillating fields applied to Ising-type models, we qualitatively associate this dynamic transition with the localization/delocalization transition of “spatial hysteresis” loops. Depending on the relative width of the magnetic film, L, compared to the wavelength of the external field, λ, different transition regimes are observed. For small systems (L < λ), the transition is associated with the Standard Stochastic Resonance regime, while, for large systems (L > λ), the transition is driven by Anomalous Stochastic Resonance. The origin of the latter is identified as due to the emergence of an additional relevant lengthscale, namely the roughness of the spin domain switching interface. The distinction between different stochastic resonance regimes is discussed at length, both qualitatively by means of snapshot configurations, as well as quantitatively via residence-length and order-parameter probability distributions
format Articulo
Articulo
author Loscar, Ernesto Selim
Candia, Julián Marcelo
author_facet Loscar, Ernesto Selim
Candia, Julián Marcelo
author_sort Loscar, Ernesto Selim
title Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
title_short Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
title_full Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
title_fullStr Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
title_full_unstemmed Stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
title_sort stochastic resonance and dynamic first-order pseudo-phase transitions in the irreversible growth of thin films underspatially periodic magnetic fields
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/104492
http://hdl.handle.net/11336/7484
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AT candiajulianmarcelo stochasticresonanceanddynamicfirstorderpseudophasetransitionsintheirreversiblegrowthofthinfilmsunderspatiallyperiodicmagneticfields
bdutipo_str Repositorios
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