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Title: Temperature-dependent structural property and power factor of n type thermoelectric Bi{sub 0.90}Sb{sub 0.10} and Bi{sub 0.86}Sb{sub 0.14} alloys

Thermal variation of structural property, linear thermal expansion coefficient (α), resistivity (ρ), thermopower (S), and power factor (PF) of polycrystalline Bi{sub 1-x}Sb{sub x} (x = 0.10 and 0.14) samples are reported. Temperature-dependent powder diffraction experiments indicate that samples do not undergo any structural phase transition. Rietveld refinement technique has been used to perform detailed structural analysis. Temperature dependence of α is found to be stronger for Bi{sub 0.90}Sb{sub 0.10}. Also, PF for direct band gap Bi{sub 0.90}Sb{sub 0.10} is higher as compared to that for indirect band gap Bi{sub 0.86}Sb{sub 0.14}. Role of electron-electron and electron-phonon scattering on ρ, S, and PF has been discussed.
Authors:
;  [1] ; ;  [1] ;  [2] ; ;  [3] ;  [4]
  1. Department of Physics, University of Calcutta, 92 A P C Road, Kolkata 700 009 (India)
  2. (India)
  3. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064 (India)
  4. Department of Physics, Raiganj College (University College), Uttar Dinajpur 733 134 (India)
Publication Date:
OSTI Identifier:
22253778
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; DIFFRACTION; ELECTRONS; PHASE TRANSFORMATIONS; PHONONS; POLYCRYSTALS; POWDERS; POWER FACTOR; TEMPERATURE DEPENDENCE; THERMAL EXPANSION