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Stochastic properties and Brillouin light scattering response of thermally driven collective magnonic modes on the arrays of dipole coupled nanostripes

Stochastic properties and Brillouin light scattering response of thermally driven collective... In the present paper, the problem of thermal excitation of collective (magnonic) Bloch magnetostatic modes on a one-dimensional array of magnetic stripes has been addressed. It has been shown that partially phase-correlated oscillations localized on individual stripes can be regarded as an ensemble of individual harmonic oscillators interpretable in terms of independent degrees of freedom of the magnetic system subject to the low-energy Rayleigh-Jeans statistics. Numerical simulations of the Brillouin light scattering spectra, based on this approach, have shown that the n th Bloch mode in strongly coupled stripes contributes mainly to the scattering in the n th Brillouin zone. Our calculations have also confirmed numerically the noncoherent wide-angle character of the BLS, demonstrated experimentally earlier. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Stochastic properties and Brillouin light scattering response of thermally driven collective magnonic modes on the arrays of dipole coupled nanostripes

Physical Review B , Volume 81 (5) – Feb 1, 2010
14 pages

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References (32)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2010 The American Physical Society
ISSN
1550-235X
DOI
10.1103/PhysRevB.81.054418
Publisher site
See Article on Publisher Site

Abstract

In the present paper, the problem of thermal excitation of collective (magnonic) Bloch magnetostatic modes on a one-dimensional array of magnetic stripes has been addressed. It has been shown that partially phase-correlated oscillations localized on individual stripes can be regarded as an ensemble of individual harmonic oscillators interpretable in terms of independent degrees of freedom of the magnetic system subject to the low-energy Rayleigh-Jeans statistics. Numerical simulations of the Brillouin light scattering spectra, based on this approach, have shown that the n th Bloch mode in strongly coupled stripes contributes mainly to the scattering in the n th Brillouin zone. Our calculations have also confirmed numerically the noncoherent wide-angle character of the BLS, demonstrated experimentally earlier.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Feb 1, 2010

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