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The thermomechanical effect in normal liquid3He

The thermomechanical effect in normal liquid3He A thermomechanical effect has been found in normal liquid3He. The effect appears only when the temperature gradient is established across liquid3He confined in small pores so that the3He quasiparticle scattering is boundary limited. This was achieved with a porous plug of packed 70 nm copper-oxide powder. The magnitude of ΔP/gDT varies from 4 C at 2 mK to ∼C at 20 mK, where P is pressure, T is temperature and C is the heat capacity per unit volume. The sign is positive, meaning that the3He “moves” from cold to hot. If viewed as an analogue of thermoelectricity, the magnitude of this thermomechanical effect is unsurprising. However, as shown in the following paper, it is an order of magnitude larger than a theoretical prediction for liquid3He. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

The thermomechanical effect in normal liquid3He

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References (11)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00754521
Publisher site
See Article on Publisher Site

Abstract

A thermomechanical effect has been found in normal liquid3He. The effect appears only when the temperature gradient is established across liquid3He confined in small pores so that the3He quasiparticle scattering is boundary limited. This was achieved with a porous plug of packed 70 nm copper-oxide powder. The magnitude of ΔP/gDT varies from 4 C at 2 mK to ∼C at 20 mK, where P is pressure, T is temperature and C is the heat capacity per unit volume. The sign is positive, meaning that the3He “moves” from cold to hot. If viewed as an analogue of thermoelectricity, the magnitude of this thermomechanical effect is unsurprising. However, as shown in the following paper, it is an order of magnitude larger than a theoretical prediction for liquid3He.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Nov 22, 2004

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