Report gives measurements of absolute thermoelectric powers of dilute gold-platinum alloys and influence of quenched-in lattice vacancies on their thermoelectric powers. It investigates phonon-drag component of thermoelectric power as a function of platinum concentration, and change in phonon-drag thermoelectric power by lattice vacancies

Baarle, C. V.

Huebener, R. P.

English

NASA Technical Reports Server

July 1969
	 Brief 69-10206 
TES
AEC-NASA TECH BRIEF 
AEC-NASA  Tech Briefs describe innovations resulting from the research and development program 
of the U.S. AEC or from AEC-NASA interagency efforts. They are issued to encourage commercial 
application. Tech Briefs are published by NASA and may be purchased, at 15 cents each, from 
the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Measurements of Thermoelectric Power in Annealed and
Quenched Gold-Platinum Alloys 
.
Measurements of the absolute thermoelectric 
powers of dilute gold-platinum alloys, and of the in-
fluence of quenched-in lattice vacancies on their 
thermoelectric powers, have been reported (I). The 
main purposes were study of the phonon-drag com-
ponent of the thermoelectric power in such alloys as 
a function of the platinum concentration, and investi-
gation of the change, in their phonon-drag thermo-
electric power, caused by quenched-in lattice vacan-
cies. 
The specimens investigated contained 0.11, 0.50, 
1.03, and 4.99 at .% Pt. The thermoelectric measure-
ments with annealed alloys were carried out between 
4.2' and 300K; with the quenched alloys, between 
4.2' and 220K. 
The alloys containing I at .% Pt, or less, clearly 
showed a positive phonon-drag component (Se) of the 
thermoelectric power below about 150K. The posi-
tive values of S' became smaller with increasing 
platinum concentration. At 20 to 30K, S 9 in these 
alloys changed its sign and was negative at very low 
temperatures. It is suggested that the appearance of 
a negative phonon-drag thermoelectric power in the 
alloys at very low temperatures is based on the anisot-
ropy of the relaxation times for electron scattering. 
Quenched-in lattice vacancies reduced S9 in the 
alloys containing I at .% Pt or less. The reduction of 
/S/ due to vacancies was very pronounced at low 
temperatures where the S 9 in the annealed alloys 
was negative. This is explained by the anisotropy of 
the electron scattering by vacancies, which apparently 
is opposite to the anisotropy of the electron scattering 
by the Pt ions, thus leading to enhancement of the 
positive contributions to S, at low temperatures, due 
to vacancies.
The report (1) includes the experimental proced-
ures, analysis of the data, experimental results for 
the annealed and quenched alloys, and discussion of 
the annealed alloys and the influence of lattice 
vacancies. 
Reference: 
I. R. P. Huebener and C. van Baarle, Phys. Rev. 
172(3), 699 (Aug. 1968). 
Notes: 
I. Industrial metallurgists who are contemplating use 
of these alloys may be interested. 
2. Inquiries concerning this innovation may be di-
rected to:
Office of Industrial Cooperation 
Argonne National Laboratory 
9700 South Cass Avenue 
Argonne, Illinois 60439 
Reference: B69-10206 
Source: R. P. 1-luebener and C. van Baarle 
Solid State Science Division
(ARG-10303) 
Patent status: 
Inquiries concerning rights for commercial use of 
this innovation may be made to: 
Mr. George H. Lee, Chief 
Chicago Patent Group 
U.S. Atomic Energy Commission 
Chicago Operations Office 
9800 South Cass Avenue 
Argonne, Illinois 60439
Category 03 
This document was prepared under the sponsorship of the Atomic 
Energy Commission and/or the National Aeronautics and Space 
Administration. Neither the United States Government nor any per-
son acting on behalf of the United States Government assumes any
liability resulting from the use of the information contained in this 
document, or warrants that the use of any information, apparatus, 
method, or process disclosed in this document may not infringe pri-
vately owned rights.
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Measurements of thermoelectric power in annealed and quenched gold-platinum alloys

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