Amplification of evanescent acoustic waves by the layer of 2D magnetic composite

Tetyana V. Laptyeva 1Olga S. Sukhorukova 1Sergey V. Tarasenko 1Vladimir G. Shavrov 2

1. National Academy of Sciences of Ukraine, A.Galkin Donetsk Institute for Physics & Technology (DonPTI NASU), Roza Luxemburg 72, Donetsk 83114, Ukraine
2. Institute of Radio Engineering and Electronics RAS (IRE RAS), Mokhovaya, 11, Moscow 125009, Russian Federation

Abstract

In this work the conditions for resonance amplification by the layer of 2D magnetic composite both bulk and shear evanescent waves incident upon the materials’ surface have been determined. As an example of composite medium the system of identical metal-coated ferro- and antiferromagnetic wires parallel to the Z-direction (it’s also the easy axes) in the elastically isotropic nonmagnetic matrix have been considered. Analyze of this dynamical problem was carried out in the frame of effective medium method. To this end the acoustic analog of Maxwell, Garnett, symmetrized Maxwell-Garnett, and Sheng approximations that actively used in polariton dynamics of fine-dispersed media have been obtained. Received data was correlated with the results of shear bulk wave scattering by the isolated metal-coated ferro- and antiferromagnetic cylinders.

 

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Presentation: Poster at E-MRS Fall Meeting 2009, Symposium I, by Tetyana V. Laptyeva
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-11 13:17
Revised:   2009-06-07 00:48