Dynamic Exchange Coupling in Magnetic Bilayers

Bret Heinrich, Yaroslav Tserkovnyak, Georg Woltersdorf, Arne Brataas, Radovan Urban, and Gerrit E. W. Bauer
Phys. Rev. Lett. 90, 187601 – Published 9 May 2003

Abstract

A long-range dynamic interaction between ferromagnetic films separated by normal-metal spacers is reported, which is communicated by nonequilibrium spin currents. It is measured by ferromagnetic resonance and explained by an adiabatic spin-pump theory. In such a resonance the spin-pump mechanism of spatially separated magnetic moments leads to an appreciable increase in the resonant linewidth when the resonance fields are well apart, and results in a dramatic linewidth narrowing when the resonant fields approach each other.

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  • Received 25 October 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.187601

©2003 American Physical Society

Authors & Affiliations

Bret Heinrich1, Yaroslav Tserkovnyak2, Georg Woltersdorf1, Arne Brataas3, Radovan Urban1, and Gerrit E. W. Bauer4

  • 1Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada
  • 2Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
  • 3Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
  • 4Department of NanoScience, Delft University of Technology, 2628 CJ Delft, The Netherlands

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Issue

Vol. 90, Iss. 18 — 9 May 2003

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