Longitudinal magnetization dynamics in Heisenberg magnets: Spin Green functions approach (Review Article)
| Autor: | V. N. Krivoruchko |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Magnetization dynamics Physics and Astronomy (miscellaneous) Condensed matter physics Heisenberg model Thermodynamic equilibrium Demagnetizing field General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Специальный выпуск. К 80-летию со дня рождения А.И. Звягина Magnetization Ferromagnetism Ferrimagnetism 0103 physical sciences 010306 general physics 0210 nano-technology Spin-½ |
| Zdroj: | Low Temperature Physics. 43:1245-1253 |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/1.5010306 |
| Popis: | Original article: Fiz. Nizk. Temp. 43, 1565-1574 ABSTRACT In spite of the fact that dynamical properties of magnets have been extensively studied over the past years, the longitudinal magnetization dynamics is still much less understood than transverse one even in the equilibrium state of a system. In this paper, we give a review of existing, based on quantum-mechanical approach, theoretical descriptions of the longitudinal magnetization dynamics for ferro-, ferri- and antiferromagnetic dielectrics. The aim is to reveal specific features of this type of magnetization vibrations under description a system within the framework of one of the basic model theory of magnetism—the Heisenberg model. Related experimental investigations as well as open questions are also briefly discussed. We hope that understanding of the longitudinal magnetization dynamics distinctive features in the equilibrium state have to be a reference point for a theory uncovering the physical mechanisms that govern ultrafast spin dynamics after femtosecond laser pulse demagnetization when a system is far beyond an equilibrium state. |
| Databáze: | OpenAIRE |
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