Statistical properties of Barkhausen noise in amorphous ferromagnetic films

We investigate the statistical properties of the Barkhausen noise in amorphous ferromagnetic films with thicknesses in the range between 100 and 1000 nm. From Barkhausen noise time series measured with the traditional inductive technique, we perform a wide statistical analysis and establish the sc...

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Principais autores:	Bohn, Felipe, Corrêa, Marcio Assolin, Carara, M., Papanikolaou, Stefanos, Durin, G., Sommer, Rubem Luis
Formato:	article
Idioma:	English
Publicado em:	American Physical Society
Assuntos:	Ruído de Barkhausen Filmes ferromagnéticos amorfos Barkhausen noise Amorphous ferromagnetic films
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/45025
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spelling	ri-123456789-450252023-02-14T18:28:48Z Statistical properties of Barkhausen noise in amorphous ferromagnetic films Bohn, Felipe Corrêa, Marcio Assolin Carara, M. Papanikolaou, Stefanos Durin, G. Sommer, Rubem Luis Ruído de Barkhausen Filmes ferromagnéticos amorfos Barkhausen noise Amorphous ferromagnetic films We investigate the statistical properties of the Barkhausen noise in amorphous ferromagnetic films with thicknesses in the range between 100 and 1000 nm. From Barkhausen noise time series measured with the traditional inductive technique, we perform a wide statistical analysis and establish the scaling exponents τ , α, 1/σ νz, and ϑ. We also focus on the average shape of the avalanches, which gives further indications on the domain-wall dynamics. Based on experimental results, we group the amorphous films in a single universality class, characterized by scaling exponents τ = 1.28 ± 0.02, α = 1.52 ± 0.3, and 1/σ νz = ϑ = 1.83 ± 0.03, values compatible with that obtained for several bulk amorphous magnetic materials. Besides, we verify that the avalanche shape depends on the universality class. By considering the theoretical models for the dynamics of a ferromagnetic domain wall driven by an external magnetic field through a disordered medium found in literature, we interpret the results and identify an experimental evidence that these amorphous films, within this thickness range, present a typical three-dimensional magnetic behavior with predominant short-range elastic interactions governing the domain-wall dynamics. Moreover, we provide experimental support for the validity of a general scaling form for the average avalanche shape for non-mean-field systems We investigate the statistical properties of the Barkhausen noise in amorphous ferromagnetic films with thicknesses in the range between 100 and 1000 nm. From Barkhausen noise time series measured with the traditional inductive technique, we perform a wide statistical analysis and establish the scaling exponents τ , α, 1/σ νz, and ϑ. We also focus on the average shape of the avalanches, which gives further indications on the domain-wall dynamics. Based on experimental results, we group the amorphous films in a single universality class, characterized by scaling exponents τ = 1.28 ± 0.02, α = 1.52 ± 0.3, and 1/σ νz = ϑ = 1.83 ± 0.03, values compatible with that obtained for several bulk amorphous magnetic materials. Besides, we verify that the avalanche shape depends on the universality class. By considering the theoretical models for the dynamics of a ferromagnetic domain wall driven by an external magnetic field through a disordered medium found in literature, we interpret the results and identify an experimental evidence that these amorphous films, within this thickness range, present a typical three-dimensional magnetic behavior with predominant short-range elastic interactions governing the domain-wall dynamics. Moreover, we provide experimental support for the validity of a general scaling form for the average avalanche shape for non-mean-field systems 2021-11-25T15:28:02Z 2021-11-25T15:28:02Z 2014-09-29 article BOHN, Felipe; CORRÊA, Marcio Assolin.; CARARA, M.; PAPANIKOLAOU, Stefanos.; DURIN, G.; SOMMER, Rubem Luis. Statistical properties of Barkhausen noise in amorphous ferromagnetic films. Physical Review e, [s.l.], v. 90, n. 3, p. 032821/1-032821/9, 29 set. 2014. American Physical Society (APS). Disponível em: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.90.032821. Acesso em: 24 mai. 2020. DOI: http://dx.doi.org/10.1103/physreve.90.032821. 2470-0053 2470-0045 https://repositorio.ufrn.br/handle/123456789/45025 en American Physical Society
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Ruído de Barkhausen Filmes ferromagnéticos amorfos Barkhausen noise Amorphous ferromagnetic films
spellingShingle	Ruído de Barkhausen Filmes ferromagnéticos amorfos Barkhausen noise Amorphous ferromagnetic films Bohn, Felipe Corrêa, Marcio Assolin Carara, M. Papanikolaou, Stefanos Durin, G. Sommer, Rubem Luis Statistical properties of Barkhausen noise in amorphous ferromagnetic films
description	We investigate the statistical properties of the Barkhausen noise in amorphous ferromagnetic films with thicknesses in the range between 100 and 1000 nm. From Barkhausen noise time series measured with the traditional inductive technique, we perform a wide statistical analysis and establish the scaling exponents τ , α, 1/σ νz, and ϑ. We also focus on the average shape of the avalanches, which gives further indications on the domain-wall dynamics. Based on experimental results, we group the amorphous films in a single universality class, characterized by scaling exponents τ = 1.28 ± 0.02, α = 1.52 ± 0.3, and 1/σ νz = ϑ = 1.83 ± 0.03, values compatible with that obtained for several bulk amorphous magnetic materials. Besides, we verify that the avalanche shape depends on the universality class. By considering the theoretical models for the dynamics of a ferromagnetic domain wall driven by an external magnetic field through a disordered medium found in literature, we interpret the results and identify an experimental evidence that these amorphous films, within this thickness range, present a typical three-dimensional magnetic behavior with predominant short-range elastic interactions governing the domain-wall dynamics. Moreover, we provide experimental support for the validity of a general scaling form for the average avalanche shape for non-mean-field systems
format	article
author	Bohn, Felipe Corrêa, Marcio Assolin Carara, M. Papanikolaou, Stefanos Durin, G. Sommer, Rubem Luis
author_facet	Bohn, Felipe Corrêa, Marcio Assolin Carara, M. Papanikolaou, Stefanos Durin, G. Sommer, Rubem Luis
author_sort	Bohn, Felipe
title	Statistical properties of Barkhausen noise in amorphous ferromagnetic films
title_short	Statistical properties of Barkhausen noise in amorphous ferromagnetic films
title_full	Statistical properties of Barkhausen noise in amorphous ferromagnetic films
title_fullStr	Statistical properties of Barkhausen noise in amorphous ferromagnetic films
title_full_unstemmed	Statistical properties of Barkhausen noise in amorphous ferromagnetic films
title_sort	statistical properties of barkhausen noise in amorphous ferromagnetic films
publisher	American Physical Society
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/45025
work_keys_str_mv	AT bohnfelipe statisticalpropertiesofbarkhausennoiseinamorphousferromagneticfilms AT correamarcioassolin statisticalpropertiesofbarkhausennoiseinamorphousferromagneticfilms AT cararam statisticalpropertiesofbarkhausennoiseinamorphousferromagneticfilms AT papanikolaoustefanos statisticalpropertiesofbarkhausennoiseinamorphousferromagneticfilms AT during statisticalpropertiesofbarkhausennoiseinamorphousferromagneticfilms AT sommerrubemluis statisticalpropertiesofbarkhausennoiseinamorphousferromagneticfilms
_version_	1773965242761478144

Statistical properties of Barkhausen noise in amorphous ferromagnetic films

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