"Resonance" phenomena in thermal diffusion processes in two-layer structures

Details "Resonance" phenomena in thermal diffusion processes in two-layer structures "Resonance" phenomena in thermal diffusion processes in two-layer structures

2002-02-28

arxiv.org/abs/cond-mat/0202539v1

Physics

Condensed Matter

13 pages, 3 figures

Scientific paper

10.1063/1.1468899

The dependence on chopper frequency of the effective thermal diffusivity and effective thermal conductivity in photoacoustic experiments is discussed. The theoretical model of a two-layer structure at rear-surface illumination in the high frequency limit is considered. It is shown that the effective thermal diffusivity presents ``resonance'' while the effective thermal conductivity sharply changes its magnitude and sign. Such ``resonant'' behavior strongly depends on the surface thermal conductivities associated with the interface thermal contacts.

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