The Effects of Gaseous Helium and Nitrogen on the Thermopower Measurements : A Note of Concern for the Discrepancy of the Results Observed in High Temperature Superconductors

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概要

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• We investigated the effects of gaseous helium and nitrogen on the thermopower measurements. It was observed that for a constant power supply to the heater, the temperature gradient ΔT established across the sample, lead (Pb) in our case, depended upon the thermal conductivity of the gas with which the sample vessel was filled. This affected the estimation of the thermopower S since the measured ΔT was probably a pseudo value due to the heat losses that occurred in the presence of a heat conducting gas. A qualitative model was introduced to account for the physical processes taking place during the thermopower measurements for vessels filled with heat conducting gases. The effects of gas adsorption and desorption to and from the sample respectively are also discussed.

• 社団法人応用物理学会の論文
• 1993-10-15

著者

• Arai T

  Osaka Prefecture Univ. Sakai

• Fukami Takeshi

  Department Of Cardiothoracic Surgery The University Of Tokyo Graduate School Of Medicine

• Aomine T

  Dept. Of Physics Kyushu Univ.

• Aomine Takafumi

  Department Of Physics Faculty Of Science Kyushu University

• Panagopoulos Christos

  Dept. of Physics, Kyushu Univ.

• PANAGOPOULOS Christos

  Department of Physics, Kyushu University

• Panagopoulos Christos

  Dept. Of Physics Kyushu Univ.

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