The effect of high pressure on the thermoelectric power and resistance of aluminum and gold
Bourassa, Ronald Ray
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/25713
Description
Title
The effect of high pressure on the thermoelectric power and resistance of aluminum and gold
Author(s)
Bourassa, Ronald Ray
Issue Date
1967
Doctoral Committee Chair(s)
Lazarus, David
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
thermoelectric power
thermoelectric resistance
aluminum
gold
nickel
platinum
Language
en
Abstract
The effect of pressure up to 4 kbar on the thermoelectric
power of aluminum, gold, nickel and platinum has been determined.
The change in resistance with pressure of aluminum and gold has
also been measured. Measurements were carried out at temperatures
between room temperature and 1300 oK or, in the case of aluminum,
o between room temperature and 900 K.
A null method was used for the resistance measurements
and for the thermoelectric power measurements, requiring an externallyheated
pressure vessel. The use of a special molybdenum
alloy made this possible.
The high temperature thermoelectric power data for
aluminum are separated into terms associated with three thermally
activated defects: the monovacancy, the divacancy, and the impurityvacancy
pair. Values for the formation energy and the volume are
obtained for each of these defects.
The effect of vacancies in gold is dominated by the effect
of pressure on the lattice so that no quantitative results can be
determined. An effect consistent with a monovacancy model is
detected.
Measurements in platinum and nickel were carried out to
test the sensitivity of the method to changes in scattering
mechanism.
A phenomenological model is presented to explain the resistance
data in aluminum and gold. This model gives the accepted
formation volume for monovacancies in gold. It gives a value for
the formation volume of monovacancies in aluminum in agreement
with the value obtained from the thermoelectric power measurements.
The presence of divacancies in aluminum is strongly supported by
this mode 1.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
