Observation of microwave-assisted magnetization reversal in perpendicular recording media

Observation of microwave-assisted magnetization reversal in perpendicular recording media

This letter reports microwave-assisted magnetization reversal (MAMR) in a 700-Gbit/in2 perpendicular media sample. The microwave fields were applied by placing a coplanar waveguide on the media sample and feeding it with narrow microwave pulses. The switching states of the media grains were measured...

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Veröffentlicht in:Applied physics letters 2013-07, Vol.103 (4)
Hauptverfasser: Lu, Lei, Wu, Mingzhong, Mallary, Michael, Bertero, Gerardo, Srinivasan, Kumar, Acharya, Ramamurthy, Schultheiß, Helmut, Hoffmann, Axel
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container_issue 4
container_start_page
container_title Applied physics letters
container_volume 103
creator Lu, Lei
Wu, Mingzhong
Mallary, Michael
Bertero, Gerardo
Srinivasan, Kumar
Acharya, Ramamurthy
Schultheiß, Helmut
Hoffmann, Axel
description This letter reports microwave-assisted magnetization reversal (MAMR) in a 700-Gbit/in2 perpendicular media sample. The microwave fields were applied by placing a coplanar waveguide on the media sample and feeding it with narrow microwave pulses. The switching states of the media grains were measured by magnetic force microscopy. For microwaves with a frequency close to the ferromagnetic resonance (FMR) frequency of the media, MAMR was observed for microwave power higher than a certain threshold. For microwaves with certain high power, MAMR was observed for a broad microwave frequency range which covers the FMR frequency and is centered below the FMR frequency.
doi_str_mv 10.1063/1.4816798
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title Observation of microwave-assisted magnetization reversal in perpendicular recording media
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