Thermoelectric power of cerium at high pressures

Ramesh, T. G. ; Reshamwala, A. S. ; Ramaseshan, S. (1974) Thermoelectric power of cerium at high pressures Pramana - Journal of Physics, 2 (4). pp. 171-178. ISSN 0304-4289

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The electronic phase transition in cerium occurring near 7 kbar pressure at room temperature which is attributed to the 4f–5d electron promotion has been studied using thermoelectric power as a tool. The important results that have emerged out of this work are: (α) the relatively large variation in the absolute thermoelectric power of γ-cerium (normal fcc phase) with pressure prior to the phase transition (in contrast to the rather small resistivity change with pressure in this region); (b) a sharp decrease in the thermoelectric power accompanying the iso-structural γ-α phase transition; and (c) the continuous decrease in the thermoelectric power of α-cerium (collapsed fcc phase) with pressure, ultimately changing sign at higher pressures. An explanation based on the "virtual bound state" model is proposed to account for these results.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Thermoelectric Power; Cerium; High Pressure
ID Code:35073
Deposited On:17 Apr 2011 14:34
Last Modified:17 May 2016 17:59

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