Localization of magnetic excitations in 1-D quasiperiodic chains: a semi-classical approach

U.L. Fulco, Dory H.A.L. Anselmo and E.L. Albuquerque

Physica A: Statistical Mechanics and its Applications, 2004, vol. 342, issue 3, 462-470

Abstract: A semi-classical theory is employed to investigate the spin wave spectra and the localization profile of linear quasiperiodic binary superlattices, where one of their components is a ferromagnetic material, the other one being an antiferromagnet. The calculations are carried out for the exchange-dominated regime within the framework of the Heisenberg model, considering a torque equation of motion for the magnetizations. For numerical calculations, we consider the antiferromagnetic material as MnF2, and Fe is the ferromagnetic one. The quasiperiodic arrangement gives rise to localized spin wave spectra, which were observed previously in analogous periodic structures, but only for higher dimensions. Such spectra is analyzed through evaluation of scaling exponents, explicitly demonstrating that our magnetic structure presents fractal features.

Keywords: Exchange energy; Heisenberg model; Localization; Fractals; Spin waves (search for similar items in EconPapers)
Date: 2004
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378437104006806
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:342:y:2004:i:3:p:462-470

DOI: 10.1016/j.physa.2004.05.036

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().