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Title: Spectral characteristics of time resolved magnonic spin Seebeck effect

Spin Seebeck effect (SSE) holds promise for new spintronic devices with low-energy consumption. The underlying physics, essential for a further progress, is yet to be fully clarified. This study of the time resolved longitudinal SSE in the magnetic insulator yttrium iron garnet concludes that a substantial contribution to the spin current stems from small wave-vector subthermal exchange magnons. Our finding is in line with the recent experiment by S. R. Boona and J. P. Heremans [Phys. Rev. B 90, 064421 (2014)]. Technically, the spin-current dynamics is treated based on the Landau-Lifshitz-Gilbert equation also including magnons back-action on thermal bath, while the formation of the time dependent thermal gradient is described self-consistently via the heat equation coupled to the magnetization dynamics.
Authors:
; ;  [1]
  1. Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle (Germany)
Publication Date:
OSTI Identifier:
22482170
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ENERGY CONSUMPTION; FERRITE GARNETS; MAGNETIZATION; MAGNONS; SEEBECK EFFECT; SPIN; TEMPERATURE GRADIENTS; TIME DEPENDENCE; TIME RESOLUTION; YTTRIUM