Comments on The effects of gaseous helium and nitrogen on thermopower measurements : a note of concern for the discrepancy of the results observed in high temperature superconductors

Lumped thermal circuit analysis is employed to show that the pressure dependence of the thermopower reported in the above paper is due to the finite thermal conductance between the separate heated points where the differential temperature and thermoelectric potential were measured. A system which al...

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Bibliographic Details
Published in:	Japanese Journal of Applied Physics Vol. 33; no. 7A; pp. 4051 - 4052
Main Authors:	VILLAFLOR, A. B, DE LUNA, L. H
Format:	Journal Article
Language:	English
Published:	Tokyo Japanese journal of applied physics 1994
Subjects:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cuprates superconductors (high tc and insulating parent compounds) Exact sciences and technology High-Tc compounds Physics Properties of type I and type II superconductors Superconductivity Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) Y-based cuprates Inorganic compounds Pressure effects Barium oxides Transition element compounds Lumped parameter circuit High-Tc superconductors Measuring methods Differential method Quaternary compounds Copper oxides Yttrium oxides Thermoelectric properties
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Summary:	Lumped thermal circuit analysis is employed to show that the pressure dependence of the thermopower reported in the above paper is due to the finite thermal conductance between the separate heated points where the differential temperature and thermoelectric potential were measured. A system which allows equivalent measurements at a single heated point is proposed leading to a pressure independent thermopower without requiring high vacuum.
ISSN:	0021-4922 1347-4065
DOI:	10.1143/jjap.33.4051