Discrete breathers in an one-dimensional array of magnetic dots

Физика Низких Температур: Том 41, Выпуск 9 (Сентябрь 2015), c. 942-948 ( к оглавлению , назад )

Discrete breathers in an one-dimensional array of magnetic dots

Roman L. Pylypchuk ¹ and Yaroslav Zolotaryuk ²

¹ Physics Department, Ludwig-Maximilians-Universität, Theresienstrasse 37, 80333 München, Germany

² Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kyiv, 03680, Ukraine
E-mail: yzolo@bitp.kiev.ua

Received April 16, 2015

Abstract

The dynamics of the one-dimensional array of magnetic particles (dots) with the easy-plane anisotropy is investigated. The particles interact with each other via the magnetic dipole interaction and the whole system is governed by the set of Landau–Lifshitz equations. The spatially localized and time-periodic solutions known as discrete breathers (or intrinsic localized modes) are identified. These solutions have no analogue in the continuum limit and consist of the core where the magnetization vectors precess around the hard axis and the tails where the magnetization vectors oscillate around the equilibrium position.

PACS: 63.20.Pw Localized modes;
PACS: 63.20.Ry Anharmonic lattice modes;
PACS: 75.10.Hk Classical spin models.

Key words: magnetic dots, antiferromagnets, Landau–Lifshitz equations.

Published online: July 24, 2015

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