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Title: Addition and subtraction of spin pumping voltages in magnetic hybrid structures

We report an investigation of the spin pumping voltage generated in bilayers of ferromagnetic/normal metal in which the ferromagnetic layer is yttrium iron garnet or Permalloy and the normal-metal layer is Pt or Ta. We also investigated a special case in which the voltage is detected in single layer of Permalloy under ferromagnetic resonance condition. It is shown that the spin pumping voltage generated in metallic bilayers have contributions from both layers and the resulting voltage depends on the relative signs of charge currents generated by the inverse spin Hall effect. For instance, the spin pumping voltage generated in Ta has the same sign as the one generate in single layer of Permalloy, but contrary to the voltage generated in Pt. When the voltage is measured in shunted metallic bilayers, the resulting voltage can be a sum or a subtraction of the voltages generated in both layers.
Authors:
; ; ;  [1] ;  [2]
  1. Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE (Brazil)
  2. Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago (Chile)
Publication Date:
OSTI Identifier:
22262603
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 15; Other Information: (c) 2014 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; ELECTRIC POTENTIAL; FERRITE GARNETS; FERROMAGNETIC RESONANCE; HALL EFFECT; LAYERS; PERMALLOY; PUMPING; SPIN; YTTRIUM