Spin waves damping in nanometre-scale magnetic materials
Spin dynamics in magnetic nanostructured materials is a topic of great current interest. To describe spin motions
 in such magnetic systems, the phenomenological Landau–Lifshitz (LL), or the LL–Gilbert (LLG), equation
 is widely used. Damping term is one of the dominant features of m...
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| Published in: | Физика низких температур |
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| Date: | 2015 |
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| Format: | Article |
| Language: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2015
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/128069 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Spin waves damping in nanometre-scale magnetic materials / V.N. Krivoruchko // Физика низких температур. — 2015. — Т. 41, № 9. — С. 864–877. — Бібліогр.: 71 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862581343688327168 |
|---|---|
| author | Krivoruchko, V.N. |
| author_facet | Krivoruchko, V.N. |
| citation_txt | Spin waves damping in nanometre-scale magnetic materials / V.N. Krivoruchko // Физика низких температур. — 2015. — Т. 41, № 9. — С. 864–877. — Бібліогр.: 71 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | Spin dynamics in magnetic nanostructured materials is a topic of great current interest. To describe spin motions
in such magnetic systems, the phenomenological Landau–Lifshitz (LL), or the LL–Gilbert (LLG), equation
is widely used. Damping term is one of the dominant features of magnetization dynamics and plays an essential
role in these equations of motion. The form of this term is simple; however, an important question arises whether
it provides a proper description of the magnetization coupling to the thermal bath and the related magnetic fluctuations
in the real nanometre-scale magnetic materials. It is now generally accepted that for nanostructured systems
the damping term in the LL (LLG) equation fails to account for the systematics of the magnetization relaxation,
even at the linear response level. In ultrathin films and nanostructured magnets particular relaxation
mechanisms arise, extrinsic and intrinsic, which are relevant at nanometre-length scales, yet are not so efficient
in bulk materials. These mechanisms of relaxation are crucial for understanding the magnetization dynamics that
results in a linewidth dependence on the nanomagnet’s size. We give an overview of recent efforts regarding the
description of spin waves damping in nanostructured magnetic materials. Three types of systems are reviewed:
ultrathin and exchange-based films, magnetic nanometre-scale samples and patterned magnetic structures. The
former is an example of a rare case where consideration can be done analytically on microscopic footing. The
latter two are typical samples when analytical approaches hardly have to be developed and numerical calculations
are more fruitful. Progress in simulations of magnetization dynamics in nanometre-scale magnets gives
hopes that a phenomenological approach can provide us with a realistic description of spin motions in expanding
diverse of magnetic nanostructures.
|
| first_indexed | 2025-11-26T21:28:31Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-128069 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-26T21:28:31Z |
| publishDate | 2015 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Krivoruchko, V.N. 2018-01-05T17:12:44Z 2018-01-05T17:12:44Z 2015 Spin waves damping in nanometre-scale magnetic materials / V.N. Krivoruchko // Физика низких температур. — 2015. — Т. 41, № 9. — С. 864–877. — Бібліогр.: 71 назв. — англ. 0132-6414 PACS: 75.75.–c, 75.78.–n, 75.30.Ds https://nasplib.isofts.kiev.ua/handle/123456789/128069 Spin dynamics in magnetic nanostructured materials is a topic of great current interest. To describe spin motions
 in such magnetic systems, the phenomenological Landau–Lifshitz (LL), or the LL–Gilbert (LLG), equation
 is widely used. Damping term is one of the dominant features of magnetization dynamics and plays an essential
 role in these equations of motion. The form of this term is simple; however, an important question arises whether
 it provides a proper description of the magnetization coupling to the thermal bath and the related magnetic fluctuations
 in the real nanometre-scale magnetic materials. It is now generally accepted that for nanostructured systems
 the damping term in the LL (LLG) equation fails to account for the systematics of the magnetization relaxation,
 even at the linear response level. In ultrathin films and nanostructured magnets particular relaxation
 mechanisms arise, extrinsic and intrinsic, which are relevant at nanometre-length scales, yet are not so efficient
 in bulk materials. These mechanisms of relaxation are crucial for understanding the magnetization dynamics that
 results in a linewidth dependence on the nanomagnet’s size. We give an overview of recent efforts regarding the
 description of spin waves damping in nanostructured magnetic materials. Three types of systems are reviewed:
 ultrathin and exchange-based films, magnetic nanometre-scale samples and patterned magnetic structures. The
 former is an example of a rare case where consideration can be done analytically on microscopic footing. The
 latter two are typical samples when analytical approaches hardly have to be developed and numerical calculations
 are more fruitful. Progress in simulations of magnetization dynamics in nanometre-scale magnets gives
 hopes that a phenomenological approach can provide us with a realistic description of spin motions in expanding
 diverse of magnetic nanostructures. Numerous fruitful discussions with S.M. Ryabchenko are
 gratefully acknowledged. The author would like to thank
 V.O. Golub for critical reading of the manuscript. This work
 was partly supported from the European Union’s Horizon
 2020 research and innovation programme under the Marie
 Skłodowska-Curie grant agreement No 644348 (MagIC). en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К 80-летию уравнения Ландау–Лифшица Spin waves damping in nanometre-scale magnetic materials Article published earlier |
| spellingShingle | Spin waves damping in nanometre-scale magnetic materials Krivoruchko, V.N. К 80-летию уравнения Ландау–Лифшица |
| title | Spin waves damping in nanometre-scale magnetic materials |
| title_full | Spin waves damping in nanometre-scale magnetic materials |
| title_fullStr | Spin waves damping in nanometre-scale magnetic materials |
| title_full_unstemmed | Spin waves damping in nanometre-scale magnetic materials |
| title_short | Spin waves damping in nanometre-scale magnetic materials |
| title_sort | spin waves damping in nanometre-scale magnetic materials |
| topic | К 80-летию уравнения Ландау–Лифшица |
| topic_facet | К 80-летию уравнения Ландау–Лифшица |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/128069 |
| work_keys_str_mv | AT krivoruchkovn spinwavesdampinginnanometrescalemagneticmaterials |