Universal properties of magnetization dynamics in polycrystalline ferromagnetic films

We investigate the scaling behavior in the statistical properties of Barkhausen noise in ferromagnetic films. We apply the statistical treatment usually employed for bulk materials in experimental Barkhausen noise time series measured with the traditional inductive technique in polycrystalline fer...

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Principais autores: Bohn, Felipe, Corrêa, Marcio Assolin, Viegas, Alexandre da Cas, Papanikolaou, Stefanos, Durin, Gianfranco, Sommer, Rubem Luis
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Idioma:English
Publicado em: American Physical Society
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spelling ri-123456789-449942021-11-23T16:33:34Z Universal properties of magnetization dynamics in polycrystalline ferromagnetic films Bohn, Felipe Corrêa, Marcio Assolin Viegas, Alexandre da Cas Papanikolaou, Stefanos Durin, Gianfranco Sommer, Rubem Luis Não possui palavras-chaves. We investigate the scaling behavior in the statistical properties of Barkhausen noise in ferromagnetic films. We apply the statistical treatment usually employed for bulk materials in experimental Barkhausen noise time series measured with the traditional inductive technique in polycrystalline ferromagnetic films having different thickness from 100 to 1000 nm and determine the scaling exponents. Based on this procedure, we group the samples in a single universality class, since the scaling behavior of Barkhausen avalanches is characterized by exponents τ ∼ 1.5, α ∼ 2.0, and 1/σ νz ∼ ϑ ∼ 2.0 for all the films. We interpret these results in terms of theoretical models and provide experimental evidence that a well-known mean-field model for the dynamics of a ferromagnetic domainwall in three-dimensional ferromagnets can be extended for films.We identify that the films present an universal three-dimensional magnetization dynamics, governed by long-range dipolar interactions, even at the smallest thicknesses, indicating that the two-dimensional magnetic behavior commonly verified for films cannot be generalized for all thickness ranges We investigate the scaling behavior in the statistical properties of Barkhausen noise in ferromagnetic films. We apply the statistical treatment usually employed for bulk materials in experimental Barkhausen noise time series measured with the traditional inductive technique in polycrystalline ferromagnetic films having different thickness from 100 to 1000 nm and determine the scaling exponents. Based on this procedure, we group the samples in a single universality class, since the scaling behavior of Barkhausen avalanches is characterized by exponents τ ∼ 1.5, α ∼ 2.0, and 1/σ νz ∼ ϑ ∼ 2.0 for all the films. We interpret these results in terms of theoretical models and provide experimental evidence that a well-known mean-field model for the dynamics of a ferromagnetic domainwall in three-dimensional ferromagnets can be extended for films.We identify that the films present an universal three-dimensional magnetization dynamics, governed by long-range dipolar interactions, even at the smallest thicknesses, indicating that the two-dimensional magnetic behavior commonly verified for films cannot be generalized for all thickness ranges 2021-11-23T16:33:33Z 2021-11-23T16:33:33Z 2013-09-23 article BOHN, Felipe; CORREA, Marcio Assolin; VIEGAS, Alexandre da Cas; PAPANIKOLAOU, Stefanos; DURIN, Gianfranco; SOMMER, Rubem Luis. Universal properties of magnetization dynamics in polycrystalline ferromagnetic films. Physical Review e, [s.l.], v. 88, n. 3, p. 0328111-0328118, 23 set. 2013. American Physical Society (APS). Disponível em: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.88.032811. Acesso em: 24 mai. 2020. DOI: https://doi.org/10.1103/PhysRevE.88.032811 2470-0053 https://repositorio.ufrn.br/handle/123456789/44994 en application/pdf American Physical Society
institution Repositório Institucional
collection RI - UFRN
language English
topic Não possui palavras-chaves.
spellingShingle Não possui palavras-chaves.
Bohn, Felipe
Corrêa, Marcio Assolin
Viegas, Alexandre da Cas
Papanikolaou, Stefanos
Durin, Gianfranco
Sommer, Rubem Luis
Universal properties of magnetization dynamics in polycrystalline ferromagnetic films
description We investigate the scaling behavior in the statistical properties of Barkhausen noise in ferromagnetic films. We apply the statistical treatment usually employed for bulk materials in experimental Barkhausen noise time series measured with the traditional inductive technique in polycrystalline ferromagnetic films having different thickness from 100 to 1000 nm and determine the scaling exponents. Based on this procedure, we group the samples in a single universality class, since the scaling behavior of Barkhausen avalanches is characterized by exponents τ ∼ 1.5, α ∼ 2.0, and 1/σ νz ∼ ϑ ∼ 2.0 for all the films. We interpret these results in terms of theoretical models and provide experimental evidence that a well-known mean-field model for the dynamics of a ferromagnetic domainwall in three-dimensional ferromagnets can be extended for films.We identify that the films present an universal three-dimensional magnetization dynamics, governed by long-range dipolar interactions, even at the smallest thicknesses, indicating that the two-dimensional magnetic behavior commonly verified for films cannot be generalized for all thickness ranges
format article
author Bohn, Felipe
Corrêa, Marcio Assolin
Viegas, Alexandre da Cas
Papanikolaou, Stefanos
Durin, Gianfranco
Sommer, Rubem Luis
author_facet Bohn, Felipe
Corrêa, Marcio Assolin
Viegas, Alexandre da Cas
Papanikolaou, Stefanos
Durin, Gianfranco
Sommer, Rubem Luis
author_sort Bohn, Felipe
title Universal properties of magnetization dynamics in polycrystalline ferromagnetic films
title_short Universal properties of magnetization dynamics in polycrystalline ferromagnetic films
title_full Universal properties of magnetization dynamics in polycrystalline ferromagnetic films
title_fullStr Universal properties of magnetization dynamics in polycrystalline ferromagnetic films
title_full_unstemmed Universal properties of magnetization dynamics in polycrystalline ferromagnetic films
title_sort universal properties of magnetization dynamics in polycrystalline ferromagnetic films
publisher American Physical Society
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/44994
work_keys_str_mv AT bohnfelipe universalpropertiesofmagnetizationdynamicsinpolycrystallineferromagneticfilms
AT correamarcioassolin universalpropertiesofmagnetizationdynamicsinpolycrystallineferromagneticfilms
AT viegasalexandredacas universalpropertiesofmagnetizationdynamicsinpolycrystallineferromagneticfilms
AT papanikolaoustefanos universalpropertiesofmagnetizationdynamicsinpolycrystallineferromagneticfilms
AT duringianfranco universalpropertiesofmagnetizationdynamicsinpolycrystallineferromagneticfilms
AT sommerrubemluis universalpropertiesofmagnetizationdynamicsinpolycrystallineferromagneticfilms
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