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Ferromagnetic resonance of individual magnetic double layer microwires

J. Appl. Phys. 106, 083906 (2009); doi:10.1063/1.3245340

Published 21 October 2009

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Yat-Yin Au and Snorri Ingvarsson
Science Institute, University of Iceland, Dunhaga 3, Reykjavik IS-107, Iceland
Ferromagnetic resonance measurements were done on individual magnetic double layer microwires. Two magnetic precession modes, namely, the acoustic (in-phase) and the optical (out-of-phase) modes, were clearly revealed. Their frequency dependencies on applied magnetic field were measured, fitted with simple theoretical predictions, and explained in the context of interlayer magnetostatic dipolar coupling. The effectiveness of exciting the two precession modes by injected microwave electric current was studied against different layer dimensions. The results are highly relevant to fast switching of small magnetic devices relying on Amperian field generated by in-plane current inside the devices. ©2009 American Institute of Physics
History: Received 29 June 2009; accepted 14 September 2009; published 21 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083906/1
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KEYWORDS and PACS

Keywords
PACS
  • 76.50.+g
    Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
  • 75.70.Cn
    Magnetic properties of interfaces
  • 75.50.Tt
    Fine-particle magnetic systems; nanocrystalline materials
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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