Domain wall depinning from FM/AFM interface defects by spin-polarized current
We report a theoretical investigation of the impact of spin-transfer torque on magnetic head-to-head domain walls of Fe and Ni80Fe20 (Permalloy PyTM) nanowires exchange coupled to a two-sublattice uniaxial antiferromagnetic substrate. Our results indicate that provided the interface exchange interac...
| Main Authors: | , , , , , |
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| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
AIP Publishing LLC
2022-03-01
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| Colecção: | AIP Advances |
| Acesso em linha: | http://dx.doi.org/10.1063/9.0000342 |
| _version_ | 1828230221341392896 |
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| author | F. A. L. Andrade F. V. S. Diniz S. M. S. B. Martins Jr. L. L. Oliveira Ana L. Dantas A. S. Carriço |
| author_facet | F. A. L. Andrade F. V. S. Diniz S. M. S. B. Martins Jr. L. L. Oliveira Ana L. Dantas A. S. Carriço |
| author_sort | F. A. L. Andrade |
| collection | DOAJ |
| description | We report a theoretical investigation of the impact of spin-transfer torque on magnetic head-to-head domain walls of Fe and Ni80Fe20 (Permalloy PyTM) nanowires exchange coupled to a two-sublattice uniaxial antiferromagnetic substrate. Our results indicate that provided the interface exchange interaction is large enough, the domain walls pin to interface defects consisting of steps perpendicular to the easy antiferromagnetic axis, separating terraces with opposite effective interface exchange fields. We also found that the dipolar and interface energies lead to narrow V-shaped domain walls and that the spin-transfer torque effects are restricted to the domain wall. Depinning walls from the step defect at the interface require polarized spin current densities of the order of 107 A/cm2 for both materials. |
| first_indexed | 2024-04-12T18:45:14Z |
| format | Article |
| id | doaj.art-57e77b84a4da4b43bd79dffbe6c7dd2d |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-12T18:45:14Z |
| publishDate | 2022-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-57e77b84a4da4b43bd79dffbe6c7dd2d2022-12-22T03:20:37ZengAIP Publishing LLCAIP Advances2158-32262022-03-01123035252035252-510.1063/9.0000342Domain wall depinning from FM/AFM interface defects by spin-polarized currentF. A. L. Andrade0F. V. S. Diniz1S. M. S. B. Martins Jr.2L. L. Oliveira3Ana L. Dantas4A. S. Carriço5Department de Physics, State University of Rio Grande do Norte, Mossoró, RN, BrazilDepartment de Physics, State University of Rio Grande do Norte, Mossoró, RN, BrazilDepartment de Physics, State University of Maranhão, São Luís, MA, BrazilDepartment of Science and Technology, State University of Rio Grande do Norte, Natal, RN, BrazilDepartment de Physics, State University of Rio Grande do Norte, Mossoró, RN, BrazilDepartment de Physics, Federal University of Rio Grande do Norte, Natal, RN, BrazilWe report a theoretical investigation of the impact of spin-transfer torque on magnetic head-to-head domain walls of Fe and Ni80Fe20 (Permalloy PyTM) nanowires exchange coupled to a two-sublattice uniaxial antiferromagnetic substrate. Our results indicate that provided the interface exchange interaction is large enough, the domain walls pin to interface defects consisting of steps perpendicular to the easy antiferromagnetic axis, separating terraces with opposite effective interface exchange fields. We also found that the dipolar and interface energies lead to narrow V-shaped domain walls and that the spin-transfer torque effects are restricted to the domain wall. Depinning walls from the step defect at the interface require polarized spin current densities of the order of 107 A/cm2 for both materials.http://dx.doi.org/10.1063/9.0000342 |
| spellingShingle | F. A. L. Andrade F. V. S. Diniz S. M. S. B. Martins Jr. L. L. Oliveira Ana L. Dantas A. S. Carriço Domain wall depinning from FM/AFM interface defects by spin-polarized current AIP Advances |
| title | Domain wall depinning from FM/AFM interface defects by spin-polarized current |
| title_full | Domain wall depinning from FM/AFM interface defects by spin-polarized current |
| title_fullStr | Domain wall depinning from FM/AFM interface defects by spin-polarized current |
| title_full_unstemmed | Domain wall depinning from FM/AFM interface defects by spin-polarized current |
| title_short | Domain wall depinning from FM/AFM interface defects by spin-polarized current |
| title_sort | domain wall depinning from fm afm interface defects by spin polarized current |
| url | http://dx.doi.org/10.1063/9.0000342 |
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