| dc.creator | Bohn, Felipe | |
| dc.creator | Corrêa, Marcio Assolin | |
| dc.creator | Carara, M. | |
| dc.creator | Papanikolaou, Stefanos | |
| dc.creator | Durin, G. | |
| dc.creator | Sommer, Rubem Luis | |
| dc.date | 2021-11-25T15:28:02Z | |
| dc.date | 2021-11-25T15:28:02Z | |
| dc.date | 2014-09-29 | |
| dc.identifier | 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. | |
| dc.identifier | 2470-0053 | |
| dc.identifier | 2470-0045 | |
| dc.identifier | https://repositorio.ufrn.br/handle/123456789/45025 | |
| dc.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 | |
| dc.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 | |
| dc.language | en | |
| dc.publisher | American Physical Society | |
| dc.subject | Ruído de Barkhausen | |
| dc.subject | Filmes ferromagnéticos amorfos | |
| dc.subject | Barkhausen noise | |
| dc.subject | Amorphous ferromagnetic films | |
| dc.title | Statistical properties of Barkhausen noise in amorphous ferromagnetic films | |
| dc.type | article | |
