Print Email Facebook Twitter Current-induced magnetization dynamics in disordered itinerant ferromagnets Title Current-induced magnetization dynamics in disordered itinerant ferromagnets Author Tserkovnyak, Y. Skadsem, H.J. Brataas, A. Bauer, G.E.W. Faculty Applied Sciences Department Kavli Institute of Nanoscience Date 2006-10-04 Abstract Current-driven magnetization dynamics in ferromagnetic metals is studied in a self-consistent adiabatic local-density approximation in the presence of spin-conserving and spin-dephasing impurity scattering. Based on a quantum kinetic equation, we derive Gilbert damping and spin-transfer torques entering the Landau-Lifshitz equation to linear order in frequency and wave vector. Gilbert damping and a current-driven dissipative torque scale identically and compete, with the result that a steady current-driven domain-wall motion is insensitive to spin dephasing in the limit of weak ferromagnetism. A uniform magnetization is found to be much more stable against spin torques in the itinerant than in the s-d model for ferromagnetism. A dynamic spin-transfer torque reminiscent of the spin pumping in multilayers is identified and shown to govern the current-induced domain-wall distortion. To reference this document use: http://resolver.tudelft.nl/uuid:4977db79-e2e7-47e4-babe-d8e51ccf8c15 DOI https://doi.org/10.1103/PhysRevB.74.144405 Publisher American Physical Society ISSN 0163-1829 Source Physical Review B, 74 (14), 2006 Part of collection Institutional Repository Document type journal article Rights (c) 2006 The Author(s); American Physical Society Files PDF Bauer2_2006.pdf 109.53 KB Close viewer /islandora/object/uuid:4977db79-e2e7-47e4-babe-d8e51ccf8c15/datastream/OBJ/view