Print Email Facebook Twitter Thermoelectricity and disorder of FeCo/MgO/FeCo magnetic tunnel junctions Title Thermoelectricity and disorder of FeCo/MgO/FeCo magnetic tunnel junctions Author Wang, S.Z. Xia, K. Bauer, G.E.W. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2014-12-05 Abstract We compute the thermoelectric transport parameterized by the Seebeck coefficient and thermal/electric conductance of random-alloy FeCo/MgO/FeCo(001) magnetic tunnel junctions (MTJs) from first principles using a generalized Landauer-Büttiker formalism. The thermopower is found to be typically smaller than those of Fe/MgO/Fe(001) MTJs. The (magneto-)Seebeck effect is sensitive to the details of the FeCo/MgO interfaces. Interfacial can greatly enhance the thermoelectric effects in MTJs. We also compute angular-dependent Seebeck coefficients that provide additional information about the transport physics. We report large deviations from the Wiedemann-Franz law at room temperature. To reference this document use: http://resolver.tudelft.nl/uuid:dcc6469c-016d-44ae-b8fd-009dfcc3b90b DOI https://doi.org/10.1103/PhysRevB.90.224406 Publisher American Physical Society ISSN 1098-0121 Source http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.224406 Source Physical Review B, 90 (22), 2014 Part of collection Institutional Repository Document type journal article Rights © 2014 American Physical Society Files PDF Bauer_2014.pdf 2.18 MB Close viewer /islandora/object/uuid:dcc6469c-016d-44ae-b8fd-009dfcc3b90b/datastream/OBJ/view