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

Fysiikka

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

8 Sitaatiot (Scopus)

18 Lataukset (Pure)

Abstrakti

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.

Alkuperäiskieli	Englanti
Artikkeli	L022006
Julkaisu	PHYSICAL REVIEW RESEARCH
Vuosikerta	5
Numero	2
DOI - pysyväislinkit	https://doi.org/10.1103/PhysRevResearch.5.L022006
Tila	Julkaistu - huhtik. 2023
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Julkaisufoorumi-taso

Jufo-taso 1

!!ASJC Scopus subject areas

Yleinen fysiikka ja tähtitiede

Pääsy asiakirjaan

10.1103/PhysRevResearch.5.L022006Lisenssi: CC BY

PhysRevResearch.5.L022006-1Final published version, 3,93 MBLisenssi: CC BY

https://urn.fi/URN:NBN:fi:tuni-202305306280Lisenssi: 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 syysk. 2022 → 30 syysk. 2022
Aktiviteetti: Konferenssiesitelmä

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@article{41412715785b44f8957817ca039ba3b9,

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.",

year = "2023",

month = apr,

doi = "10.1103/PhysRevResearch.5.L022006",

language = "English",

volume = "5",

number = "2",

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TY - JOUR

T1 - Barkhausen noise from formation of 360° domain walls in disordered permalloy thin films

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

U2 - 10.1103/PhysRevResearch.5.L022006

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

Abstrakti

Julkaisufoorumi-taso

!!ASJC Scopus subject areas

Pääsy asiakirjaan

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Aktiviteetit

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

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