Vortex polarity switching in magnets with surface anisotropy
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Vortex polarity switching in magnets with surface anisotropy
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| Creator |
Pylypovskyi, O.V.
Sheka, D.D. Kravchuk, V.P. Gaididei, Y. |
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| Subject |
К 70-летию со дня рождения В. М. Локтева
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| 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.
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| Date |
2017-06-26T16:21:03Z
2017-06-26T16:21:03Z 2015 |
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| Type |
Article
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| Identifier |
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 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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