Band structure, magneto-Seebeck and magnetoresistance at the para-to ferri-magnetic transition in the Sr2FeReO6 double perovskite
Year: 2025
Type: article
Abstract: Ferrimagnetic double perovskite Sr2FeReO6 exhibits coupled magnetic and thermoelectric phenomena near its para–ferrimagnetic transition (TC ≈ 405 K). Density functional theory with spin–orbit coupling predicts a significant Re orbital moment (+0.32 μB), large anomalous Hall (33 Ω⁻¹ cm⁻¹) and Nernst conductivities. Experiments reveal positive magnetothermopower and negative magnetoresistance below TC, resulting in a +20 % power factor enhancement at 336 K. Discrepancies between calculated and measured anomalous conductivities are attributed to reduced spin polarization and structural disorder. The work highlights topological transport and magneto-thermoelectric coupling in Sr2FeReO6.
Authors: Daou, Ramzy, Sedmidubský, David, Ahn, Kyohoon, Hébert, Sylvie, Carbonio, Raul E., Martin, Christine, Maignan, Antoine
Institutions: Centre National de la Recherche Scientifique, École Nationale Supérieure d'Ingénieurs de Caen, Normandie Université, Laboratoire de Cristallographie et Sciences des Matériaux, Université de Caen Normandie, University of Chemistry and Technology, Prague, Czech Academy of Sciences, FZU - Institute of Physics of the Czech Academy of Sciences, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Award: G569086322
OpenAlex ID: W7093342966
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