2007/12/31 by Beom Hyun Kim, Unjong Yu, Kyoo Kim +1
Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #Coupling (piping) #Electron #Exchange interaction #Magnetic and transport properties of perovskites and related materials #Monte Carlo method #Multiferroics and related materials #Polaron #Seebeck coefficient #Thermoelectric effect #Transition temperature #cond-mat.str-el
paper · pdf · doi:10.1063/1.2832883
published in Journal of Applied Physics 103(7) (American Institute of Physics) · 3 pages, 1 figures, 52nd conference on magnetism and magnetic matterials, accepted for publication in J. Appl. Phys
arxiv created 2008/01/10 · openalex publication_date 2008/01/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Employing the Monte Carlo method and the exact diagonalization, we have investigated the temperature dependence of the thermoelectric power (TEP) for the double exchange model in the dilute carrier concentration limit. We have found that the TEP follows the Heikes formula in the high temperature regime, whereas, in the intermediate temperature regime, the TEP is suppressed by the exchange coupling between itinerant electrons and local spins. In the low temperature regime, the TEP exhibits an anomalous peak and dip feature near the magnetic transition temperature TC which can be understood based on the magnetic polaron state. We have also found that the TEP, in the presence of the magnetic field, shows the positive magnetothermoelectric power near TC.