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Abstracts
We consider a new regime of sound propagation in magnetic systems above the critical point. On the basis of a general statistical model including a flow of energy between spin and lattice subsystems we found that there is a region of parameters where the sound attenuation and dispersion can be expressed in a similar way as for noncritical systems for which only the heat conduction matters. Contrary to the case of the classical heat diffusion in the critical magnetic system both the specific heat, entering the reduced frequency, as well as the effective amplitude are frequency and temperature dependent reflecting the critical singularities present in the system near its critical point.
Discipline
Journal
Year
Volume
Issue
Pages
905-908
Physical description
Dates
published
2000-05
Contributors
author
- Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
author
- Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv97z543kz