Magnetic influence on thermoelectric properties of CrO.sub.0.1./sub.N.sub.0.9./sub..

0374239 - FZÚ 2012 RIV GB eng J - Článek v odborném periodiku
Tomeš, P. - Logvinovich, D. - Hejtmánek, Jiří - Aguirre, M.H. - Weidenkaff, A.
Magnetic influence on thermoelectric properties of CrO_0.1N_0.9.
Acta Materialia. Roč. 59, č. 3 (2011), s. 1134-1140. ISSN 1359-6454. E-ISSN 1873-2453
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: chromium oxynitride * electrical properties * thermal conductivity * magnetic properties * specific heat
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.755, rok: 2011

Thermoelectric polycrystalline chromium oxynitride CrO0.09(3)N0.90(7)(with cubic symmetry and space group Fm-3m) samples were successfully prepared by thermal ammonolysis of chromium oxide. This potential n-type thermoelectric material shows a temperature dependence of the Seebeck coefficient (S = -48 μ V K-1 at 300 K)that is typical for degenerate semiconductors; the electrical resistivity(ρ300 ~ 2.8 mΩ cm), however, is highly influenced by the grain boundaries and low density (~60%) of the sample. The material exhibits a clear antiferromagnetic–paramagnetic transition simultaneously with an orthorhombic–cubic structural transition at TN = 262 K.The magnetic transition affected the material’s thermal conductivity, electrical resistivity, Seebeck coefficient, magnetic moment and specific heat.
Trvalý link: http://hdl.handle.net/11104/0207202