Vortex polarity switching in magnets with surface anisotropy
Vortex core reversal in magnetic particle is essentially influenced by a surface anisotropy. Under the action of a perpendicular static magnetic field the vortex core undergoes a shape deformation of pillow- or barrel-shaped type, depending on the type of the surface anisotropy. This deformation pla...
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| Дата: | 2015 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Назва видання: | Физика низких температур |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/122071 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Vortex polarity switching in magnets with surface anisotropy / O.V. Pylypovskyi, D.D. Sheka, V.P. Kravchuk, Y. Gaididei // Физика низких температур. — 2015. — Т. 41, № 5. — С. 466-481. — Бібліогр.: 74 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
irk-123456789-122071 |
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irk-123456789-1220712017-06-27T03:03:46Z Vortex polarity switching in magnets with surface anisotropy Pylypovskyi, O.V. Sheka, D.D. Kravchuk, V.P. Gaididei, Y. К 70-летию со дня рождения В. М. Локтева Vortex core reversal in magnetic particle is essentially influenced by a surface anisotropy. Under the action of a perpendicular static magnetic field the vortex core undergoes a shape deformation of pillow- or barrel-shaped type, depending on the type of the surface anisotropy. This deformation plays a key point in the switching mechanism: We predict that the vortex polarity switching is accompanied (i) by a linear singularity in case of Heisenberg magnet with bulk anisotropy only and (ii) by a point singularities in case of surface anisotropy or exchange anisotropy. We study in details the switching process using spin-lattice simulations and propose a simple analytical description using a wired core model, which provides an adequate description of the Bloch point statics, its dynamics and the Bloch point mediated switching process. Our analytical predictions are confirmed by spin-lattice simulations for Heisenberg magnet and micromagnetic simulations for nanomagnet with account of a dipolar interaction. 2015 Article Vortex polarity switching in magnets with surface anisotropy / O.V. Pylypovskyi, D.D. Sheka, V.P. Kravchuk, Y. Gaididei // Физика низких температур. — 2015. — Т. 41, № 5. — С. 466-481. — Бібліогр.: 74 назв. — англ. 0132-6414 PACS: 75.10.Hk, 05.45.–a, 75.70.Rf, 75.75.–c, 75.78.–n http://dspace.nbuv.gov.ua/handle/123456789/122071 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
К 70-летию со дня рождения В. М. Локтева К 70-летию со дня рождения В. М. Локтева |
| spellingShingle |
К 70-летию со дня рождения В. М. Локтева К 70-летию со дня рождения В. М. Локтева Pylypovskyi, O.V. Sheka, D.D. Kravchuk, V.P. Gaididei, Y. Vortex polarity switching in magnets with surface anisotropy Физика низких температур |
| description |
Vortex core reversal in magnetic particle is essentially influenced by a surface anisotropy. Under the action of a perpendicular static magnetic field the vortex core undergoes a shape deformation of pillow- or barrel-shaped type, depending on the type of the surface anisotropy. This deformation plays a key point in the switching mechanism: We predict that the vortex polarity switching is accompanied (i) by a linear singularity in case of Heisenberg magnet with bulk anisotropy only and (ii) by a point singularities in case of surface anisotropy or exchange anisotropy. We study in details the switching process using spin-lattice simulations and propose a simple analytical description using a wired core model, which provides an adequate description of the Bloch point statics, its dynamics and the Bloch point mediated switching process. Our analytical predictions are confirmed by spin-lattice simulations for Heisenberg magnet and micromagnetic simulations for nanomagnet with account of a dipolar interaction. |
| format |
Article |
| author |
Pylypovskyi, O.V. Sheka, D.D. Kravchuk, V.P. Gaididei, Y. |
| author_facet |
Pylypovskyi, O.V. Sheka, D.D. Kravchuk, V.P. Gaididei, Y. |
| author_sort |
Pylypovskyi, O.V. |
| title |
Vortex polarity switching in magnets with surface anisotropy |
| title_short |
Vortex polarity switching in magnets with surface anisotropy |
| title_full |
Vortex polarity switching in magnets with surface anisotropy |
| title_fullStr |
Vortex polarity switching in magnets with surface anisotropy |
| title_full_unstemmed |
Vortex polarity switching in magnets with surface anisotropy |
| title_sort |
vortex polarity switching in magnets with surface anisotropy |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2015 |
| topic_facet |
К 70-летию со дня рождения В. М. Локтева |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/122071 |
| citation_txt |
Vortex polarity switching in magnets with surface anisotropy / O.V. Pylypovskyi, D.D. Sheka, V.P. Kravchuk, Y. Gaididei // Физика низких температур. — 2015. — Т. 41, № 5. — С. 466-481. — Бібліогр.: 74 назв. — англ. |
| series |
Физика низких температур |
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AT pylypovskyiov vortexpolarityswitchinginmagnetswithsurfaceanisotropy AT shekadd vortexpolarityswitchinginmagnetswithsurfaceanisotropy AT kravchukvp vortexpolarityswitchinginmagnetswithsurfaceanisotropy AT gaidideiy vortexpolarityswitchinginmagnetswithsurfaceanisotropy |
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2023-10-18T20:41:01Z |
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2023-10-18T20:41:01Z |
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