Resonance properties of domain boundaries in quasi-two dimensional antiferromagnets


The so-called "internal modes" localized near the domain boundaries in quasi-two dimensional antiferromagnets are investigated. The possible localized states are classified and their frequency dependences on the system discreteness parameter λ=J/β, which describes the ratio of the magnitudes of the exchange interplane interaction and the magnetic anisotropy, are found. A sudden change in the spectrum of the local internal modes is observed at a critical value of this parameter, λ=λb=3/4, where the domain wall shifts from a collinear to a canted shape. When λ<λb there are one symmetric and two antisymmetric local modes, and when λ>λb the modes are two symmetric, one antisymmetric, and one shear. For discreteness parameters close to the critical value, the frequencies of some of the local modes lie deep inside the gap for the linear AFM magnon spectrum and can be observed experimentally.

Publication DOI:
Divisions: Engineering & Applied Sciences > Mathematics
Engineering & Applied Sciences > Systems analytics research institute (SARI)
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Additional Information: © 2010 American Institute of Physics. Resonance properties of domain boundaries in quasi-two dimensional antiferromagnets. Low Temperature Physics 36, 831 (2010);
Uncontrolled Keywords: Physics and Astronomy (miscellaneous)
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2010-12-02
Authors: Kovaleva, A.S.
Prilepsky, J.E. ( 0000-0002-3035-4112)
Kryukov, E.A.
Kulik, N.V.



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