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1997 | 92 | 2 | 449-452
Article title

Spin-Lattice Relaxation Effects in Critical Sound Propagation

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EN
Abstracts
EN
The nonasymptotic critical properties of sound propagation are studied in compressible Ising system above T_{C}. In the present paper we analyse a model where in addition to the coupling to two order-parameter fluctuations the sound mode couples linearly to the fluctuations of spin-energy and lattice-energy densities. Both subsystems exchange energy with the rate determined by the bare spin-lattice relaxation time. The total energy may be conserved or not. The crossover between insulator-like behaviour ~t^{-2α} and metal-like behaviour ~t^{-(zν+α)} in ultrasonic attenuation is investigated according to the value of ultrasonic frequency, the reduced temperature t, bare relaxation times and various coupling constants.
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Publisher

Year
Volume
92
Issue
2
Pages
449-452
Physical description
Dates
published
1997-08
Contributors
author
  • Institute of Physics, A. Mickiewicz University, Matejki 48/49, 60-769 Poznań, Poland
References
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Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv92z245kz
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