Large Seebeck coefficients in iron-oxypnictides: a new route towards n-type thermoelectric materials

• Published in: Physica status solidi. PSS-RRL. Rapid research letters 2008-08, Vol.2 (4), p.185-187
• Main Authors: Pinsard-Gaudart, Loreynne, Bérardan, David, Bobroff, Julien, Dragoe, Nita
• Format: Article
• Language: English
• Subjects: 72.20.Pa; 74.25.Fy; 74.70.Dd; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Metals, alloys and compounds (a15, 001c15, laves phases, chevrel phases, borocarbides, etc.); Physics; Properties of type I and type II superconductors; Superconducting materials (excluding high-tc compounds); Superconductivity; Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
• ISSN: 1862-6254; 1862-6270
• DOI: 10.1002/pssr.200802125

The iron‐oxypnictide compounds, recently reported as a new class of superconductors when appropriately doped, exhibit large Seebeck coefficients, of the order of –100 µV/K, while keeping good electrical conductivity. Their power factor shows a peak at low temperatures, suggesting possible applications of these materials in thermoelectric cooling modules in the liquid nitrogen temperature range. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) The iron‐oxypnictide compounds, recently reported as a new class of superconductors when appropriately doped, exhibit large Seebeck coefficients of the order of –100 μV/K while keeping good electrical conductivity. Their power factor shows a peak at low temperatures, suggesting possible applications of these materials in thermoelectric cooling modules in the liquid nitrogen temperature range.