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Browse Journals & Magazines > Applied Physics Letters ...> Volume:93 Issue:14 Help

Frequency modulation effect on microwave assisted magnetization switching

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3 Author(s)
Okamoto, S. ; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan ; Kikuchi, N. ; Kitakami, O.

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Frequency modulation (FM) effect on the microwave assisted switching (MAS) of magnetization has been studied by calculating the Landau–Lifshitz–Gilbert equation. Application of FM microwave can significantly reduce the switching field compared with constant frequency wave, mainly due to more effective microwave energy absorption by the spin system. The FM effect on the MAS is remarkable especially for smaller Gilbert damping of α≤0.02. For sufficient switching probability, the FM-MAS requires somewhat longer time of a few nanoseconds for the dc magnetic field parallel to the easy axis. The tilt dc field can effectively reduce the switching time.

Published in:
Applied Physics Letters  (Volume:93 ,  Issue: 14 )

Date of Publication: Oct 2008

Page(s):
142501 - 142501-3
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.2996573
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Oct 2008

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