The pressure dependence of the thermoelectric power of sodium between 5°K and 14°K
Weiss, Jonathon David
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https://hdl.handle.net/2142/29964
Description
Title
The pressure dependence of the thermoelectric power of sodium between 5°K and 14°K
Author(s)
Weiss, Jonathon David
Issue Date
1974
Doctoral Committee Chair(s)
Lazarus, David
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
pressure dependenc
thermoelectric power
sodium
Language
en
Abstract
"The effect of pressure has been measured on the thermoelectric
power of sodium between 5°K and l4°K where phonon drag is believed to play
a prominent role. A Superconducting Quantum Interference Device (""SQUID"")
was used to measure the tiny voltages involved.
At 1 and 2 kilobars no effect was observable, but at 3 kilobars
the thermoelectric power was observed to grow smaller in magnitude, but
remained negative. The effect of pressure was most noticeable above 110K
and was monotonically increasing with temperature above that point.
The results have been compared with the predictions of a theory of
phonon drag thermoelectric power by Bailyn, which are in rather good qualitative
agreement with the data. The results of this experiment therefore
support his contention that a detailed understanding of the lattice spectrum,
rather than Fermi-surface distortion, is necessary to understand the role of
phonon drag in the alkali metals."
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