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Longitudinal magnetization dynamics in Heisenberg magnets: Spin Green functions approach (Review Article)
Репозиторій DSpace/Manakin
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Longitudinal magnetization dynamics in Heisenberg magnets: Spin Green functions approach (Review Article)
Тема:
Специальный выпуск. К 80-летию со дня рождения А.И. Звягина
Інший ID:
PACS: 75.78.–n, 76.50.+g, 75.78.Jp
Посилання:
Longitudinal magnetization dynamics in Heisenberg magnets: Spin Green functions approach (Review Article) / V.N. Krivoruchko // Физика низких температур. — 2017. — Т. 43, № 11. — С. 1565-1574. — Бібліогр.: 56 назв. — англ.
Підтримка:
The author dedicates this article to the memory of Anatolii Illarionovich Zvyagin; in 1984–1990 I had the opportunity to participate in the work of scientific group led by A. I. Zvyagin on searching and investigating new types of magnetic structures and resonances in low-dimensional multiple sublattice antiferromagnets. The author is grateful for valuable discussions with V. G. Bar'yakhtar and B. A. Ivanov; I also extend appreciation to M. Belogolovskii for reading the manuscript and critical remarks. This work is partly supported by the Ukrainian State Fund for Fundamental Research (Project No. F71/59-2017 “Multifunctional Photonic Structures”) and the European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie (Project “MagIC,” Grant Agreement No. 644348).
Дата:
2017
Переглядів:
267
Завантажень:
274
Анотація:
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.
