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Minimal field requirement in precessional magnetization switching

J. Appl. Phys. 99, 013903 (2006); doi:10.1063/1.2161421

Published 10 January 2006

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Di Xiao, M. Tsoi, and Qian Niu
Department of Physics, The University of Texas at Austin, Austin, Texas 78712
We investigate the minimal field strength in precessional magnetization switching using the Landau-Lifshitz-Gilbert equation in undercritically damped systems. It is shown that precessional switching occurs when localized trajectories in phase space become unlocalized upon application of field pulses. By studying the evolution of the phase space, we obtain the analytical expression of the critical switching field in the limit of small damping for a magnetic object with biaxial anisotropy in both the easy and hard plane. We also calculate the switching times for the zero damping situation by numerical means. We show that applying the field along the medium axis is good for both small field and fast switching times. ©2006 American Institute of Physics
History: Received 9 May 2005; accepted 29 November 2005; published 10 January 2006
Permalink: http://link.aip.org/link/?JAPIAU/99/013903/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.60.Jk
    Magnetization reversal mechanisms
  • 75.75.+a
    Magnetic properties of nanostructures
  • YEAR: 2006

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ISSN:
0021-8979 (print)   1089-7550 (online)
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REFERENCES (20)
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