Magnetic domain walls interacting with dislocations in micromagnetic simulations
Abstract Defects, impurities, and embedded particles in ferromagnetic materials are long known to be responsible for the Barkhausen effect due to the jerky field-driven motion of domain walls and have more recently been shown to play a role also in domain wall dynamics in nanoscale ferromagnetic str...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | Communications Materials |
| Online Access: | https://doi.org/10.1038/s43246-024-00697-9 |
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| _version_ | 1849221040462364672 |
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| author | Sami Kaappa Suvi Santa-aho Mari Honkanen Minnamari Vippola Lasse Laurson |
| author_facet | Sami Kaappa Suvi Santa-aho Mari Honkanen Minnamari Vippola Lasse Laurson |
| author_sort | Sami Kaappa |
| collection | DOAJ |
| description | Abstract Defects, impurities, and embedded particles in ferromagnetic materials are long known to be responsible for the Barkhausen effect due to the jerky field-driven motion of domain walls and have more recently been shown to play a role also in domain wall dynamics in nanoscale ferromagnetic structures used in spintronics devices. Simulating the magnetic domain wall dynamics in the micromagnetic framework offers a straightforward route to study such systems and phenomena. However, the related work in the past suffers from material imperfections being introduced without proper physical foundation. Here, we implement dislocation stress fields in micromagnetic simulations through the induced anisotropy fields by inverse magnetostriction. The effects of individual dislocations on domain wall dynamics in thin films of different Fe surface lattice planes are characterized numerically. As a demonstration of the applicability of the implementation, we consider disorder fields due to randomly positioned dislocations with different densities, and study the avalanche-like transient approach towards the depinning transition of a domain wall driven by a slowly increasing external magnetic field. |
| format | Article |
| id | doaj-art-ee8fb92cf03d46638f9ddfd4e834f05b |
| institution | Kabale University |
| issn | 2662-4443 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Materials |
| spelling | doaj-art-ee8fb92cf03d46638f9ddfd4e834f05b2024-11-24T12:36:08ZengNature PortfolioCommunications Materials2662-44432024-11-015111110.1038/s43246-024-00697-9Magnetic domain walls interacting with dislocations in micromagnetic simulationsSami Kaappa0Suvi Santa-aho1Mari Honkanen2Minnamari Vippola3Lasse Laurson4Computational Physics Laboratory, Tampere UniversityMaterials Science and Environmental Engineering, Tampere UniversityTampere Microscopy Center, Tampere UniversityMaterials Science and Environmental Engineering, Tampere UniversityComputational Physics Laboratory, Tampere UniversityAbstract Defects, impurities, and embedded particles in ferromagnetic materials are long known to be responsible for the Barkhausen effect due to the jerky field-driven motion of domain walls and have more recently been shown to play a role also in domain wall dynamics in nanoscale ferromagnetic structures used in spintronics devices. Simulating the magnetic domain wall dynamics in the micromagnetic framework offers a straightforward route to study such systems and phenomena. However, the related work in the past suffers from material imperfections being introduced without proper physical foundation. Here, we implement dislocation stress fields in micromagnetic simulations through the induced anisotropy fields by inverse magnetostriction. The effects of individual dislocations on domain wall dynamics in thin films of different Fe surface lattice planes are characterized numerically. As a demonstration of the applicability of the implementation, we consider disorder fields due to randomly positioned dislocations with different densities, and study the avalanche-like transient approach towards the depinning transition of a domain wall driven by a slowly increasing external magnetic field.https://doi.org/10.1038/s43246-024-00697-9 |
| spellingShingle | Sami Kaappa Suvi Santa-aho Mari Honkanen Minnamari Vippola Lasse Laurson Magnetic domain walls interacting with dislocations in micromagnetic simulations Communications Materials |
| title | Magnetic domain walls interacting with dislocations in micromagnetic simulations |
| title_full | Magnetic domain walls interacting with dislocations in micromagnetic simulations |
| title_fullStr | Magnetic domain walls interacting with dislocations in micromagnetic simulations |
| title_full_unstemmed | Magnetic domain walls interacting with dislocations in micromagnetic simulations |
| title_short | Magnetic domain walls interacting with dislocations in micromagnetic simulations |
| title_sort | magnetic domain walls interacting with dislocations in micromagnetic simulations |
| url | https://doi.org/10.1038/s43246-024-00697-9 |
| work_keys_str_mv | AT samikaappa magneticdomainwallsinteractingwithdislocationsinmicromagneticsimulations AT suvisantaaho magneticdomainwallsinteractingwithdislocationsinmicromagneticsimulations AT marihonkanen magneticdomainwallsinteractingwithdislocationsinmicromagneticsimulations AT minnamarivippola magneticdomainwallsinteractingwithdislocationsinmicromagneticsimulations AT lasselaurson magneticdomainwallsinteractingwithdislocationsinmicromagneticsimulations |