Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films
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 c...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2023-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.L022006 |
| _version_ | 1797210500065394688 |
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| author | Sami Kaappa Lasse Laurson |
| author_facet | Sami Kaappa Lasse Laurson |
| author_sort | Sami Kaappa |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-24T10:11:35Z |
| format | Article |
| id | doaj.art-39a7262e00e7456e98af96a5677930df |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:11:35Z |
| publishDate | 2023-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-39a7262e00e7456e98af96a5677930df2024-04-12T17:29:56ZengAmerican Physical SocietyPhysical Review Research2643-15642023-04-0152L02200610.1103/PhysRevResearch.5.L022006Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin filmsSami KaappaLasse LaursonBarkhausen 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.http://doi.org/10.1103/PhysRevResearch.5.L022006 |
| spellingShingle | Sami Kaappa Lasse Laurson Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films Physical Review Research |
| title | Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films |
| title_full | Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films |
| title_fullStr | Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films |
| title_full_unstemmed | Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films |
| title_short | Barkhausen noise from formation of 360^{∘} domain walls in disordered permalloy thin films |
| title_sort | barkhausen noise from formation of 360 ∘ domain walls in disordered permalloy thin films |
| url | http://doi.org/10.1103/PhysRevResearch.5.L022006 |
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