Barkhausen noise from formation of 360° domain walls in disordered permalloy thin films

Sami Kaappa; Lasse Laurson

doi:10.1103/PhysRevResearch.5.L022006

Barkhausen noise from formation of 360° domain walls in disordered permalloy thin films

Sami Kaappa, Lasse Laurson

Physics

Research output: Contribution to journal › Article › Scientific › peer-review

6 Citations (Scopus)

12 Downloads (Pure)

Abstract

Barkhausen noise in disordered ferromagnets is typically understood to originate primarily from jerky field-driven motion of domain walls. We study the magnetization reversal process in disordered permalloy thin films using micromagnetic simulations and find that the magnetization reversal process consists of gradual formation of immobile 360° domain walls via a sequence of localized magnetization rotation events. The density of 360° domain walls formed within the sample as well as the statistical properties of the Barkhausen jumps are controlled by the disorder strength.

Original language	English
Article number	L022006
Journal	PHYSICAL REVIEW RESEARCH
Volume	5
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevResearch.5.L022006
Publication status	Published - Apr 2023
Publication type	A1 Journal article-refereed

Funding

The authors acknowledge the computational resources provided by CSC and support of the Academy of Finland via the Academy Project BarFume (Project No. 338955).

Keywords

Barkhausen noise
micromagnetics
permalloy
Ferromagnetism
scaling laws

Publication forum classification

Publication forum level 1

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1103/PhysRevResearch.5.L022006Licence: CC BY

PhysRevResearch.5.L022006-1Final published version, 3.93 MBLicence: CC BY

https://urn.fi/URN:NBN:fi:tuni-202305306280Licence: CC BY

Simulated magnetization reversal process and Barkhausen noise in disordered permalloy thin films
Kaappa, S. (Speaker), Santa-aho, S. (Member), Laurson, L. (Member), Vippola, M. (Member) & Honkanen, M. (Member)
27 Sept 2022 → 30 Sept 2022
Activity: Talk or presentation › Conference presentation

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title = "Barkhausen noise from formation of 360° domain walls in disordered permalloy thin films",

abstract = "Barkhausen noise in disordered ferromagnets is typically understood to originate primarily from jerky field-driven motion of domain walls. We study the magnetization reversal process in disordered permalloy thin films using micromagnetic simulations and find that the magnetization reversal process consists of gradual formation of immobile 360° domain walls via a sequence of localized magnetization rotation events. The density of 360° domain walls formed within the sample as well as the statistical properties of the Barkhausen jumps are controlled by the disorder strength.",

keywords = "Barkhausen noise, micromagnetics, permalloy, Ferromagnetism, scaling laws",

author = "Sami Kaappa and Lasse Laurson",

note = "Funding Information: The authors acknowledge the computational resources provided by CSC and support of the Academy of Finland via the Academy Project BarFume (Project No. 338955). Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

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language = "English",

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AU - Kaappa, Sami

AU - Laurson, Lasse

N1 - Funding Information: The authors acknowledge the computational resources provided by CSC and support of the Academy of Finland via the Academy Project BarFume (Project No. 338955). Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2023/4

Y1 - 2023/4

N2 - Barkhausen noise in disordered ferromagnets is typically understood to originate primarily from jerky field-driven motion of domain walls. We study the magnetization reversal process in disordered permalloy thin films using micromagnetic simulations and find that the magnetization reversal process consists of gradual formation of immobile 360° domain walls via a sequence of localized magnetization rotation events. The density of 360° domain walls formed within the sample as well as the statistical properties of the Barkhausen jumps are controlled by the disorder strength.

AB - Barkhausen noise in disordered ferromagnets is typically understood to originate primarily from jerky field-driven motion of domain walls. We study the magnetization reversal process in disordered permalloy thin films using micromagnetic simulations and find that the magnetization reversal process consists of gradual formation of immobile 360° domain walls via a sequence of localized magnetization rotation events. The density of 360° domain walls formed within the sample as well as the statistical properties of the Barkhausen jumps are controlled by the disorder strength.

KW - Barkhausen noise

KW - micromagnetics

KW - permalloy

KW - Ferromagnetism

KW - scaling laws

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DO - 10.1103/PhysRevResearch.5.L022006

M3 - Article

AN - SCOPUS:85153504030

SN - 2643-1564

VL - 5

JO - PHYSICAL REVIEW RESEARCH

JF - PHYSICAL REVIEW RESEARCH

IS - 2

M1 - L022006

ER -

Barkhausen noise from formation of 360° domain walls in disordered permalloy thin films

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Simulated magnetization reversal process and Barkhausen noise in disordered permalloy thin films

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