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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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2015 |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Zitieren: | 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. |
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Pylypovskyi, O.V. Sheka, D.D. Kravchuk, V.P. Gaididei, Y. 2017-06-26T16:21:03Z 2017-06-26T16:21:03Z 2015 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 https://nasplib.isofts.kiev.ua/handle/123456789/122071 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. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 70-летию со дня рождения В. М. Локтева Vortex polarity switching in magnets with surface anisotropy Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Vortex polarity switching in magnets with surface anisotropy |
| spellingShingle |
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 |
| 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 |
| 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. |
| topic |
К 70-летию со дня рождения В. М. Локтева |
| topic_facet |
К 70-летию со дня рождения В. М. Локтева |
| publishDate |
2015 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| 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.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.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. |
| work_keys_str_mv |
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| first_indexed |
2025-12-07T18:10:25Z |
| last_indexed |
2025-12-07T18:10:25Z |
| _version_ |
1850874030112899072 |