Microwave-Assisted Magnetic Reversal in Perpendicular Media

Microwave-assisted magnetic reversal (MAMR) has not yet been characterized in hard perpendicular media. We investigate MAMR in such media experimentally for monolayer and bilayer magnetic thin films. The coercive field can be reduced by 8% in our geometry. The response occurs over a broad frequency...

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Bibliographic Details
Published inIEEE magnetics letters Vol. 3; p. 3500104
Main Authors Boone, C., Katine, J. A., Marinero, E. E., Pisana, S., Terris, B. D.
Format Journal Article
LanguageEnglish
Published IEEE 2012
Subjects
Magnetic domains
Magnetic hysteresis
Magnetic multilayers
Magnetic recording
Magnetic resonance
Magnetodynamics
Media
microwave switching
microwave-assisted magnetic reversal (MAMR)
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Summary:Microwave-assisted magnetic reversal (MAMR) has not yet been characterized in hard perpendicular media. We investigate MAMR in such media experimentally for monolayer and bilayer magnetic thin films. The coercive field can be reduced by 8% in our geometry. The response occurs over a broad frequency range which is due to the excitation of long-wavelength spin-wave modes which can help drive reversal. Our results qualitatively match simple micromagnetic modeling.
ISSN:1949-307X
1949-3088
DOI:10.1109/LMAG.2011.2180368