Room temperature microwave-assisted recording on 500-Gbpsi-class perpendicular medium

Microwave-assisted recording on a 500-Gbpsi-class perpendicular medium was experimentally demonstrated at room temperature. Magnetization reversal under a radio-frequency magnetic field was measured by an electrically shorted coplanar waveguide, which enabled us to evaluate the change in the medium&...

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Veröffentlicht in:Journal of applied physics 2012-10, Vol.112 (8)
Hauptverfasser: Nozaki, Y., Ishida, N., Soeno, Y., Sekiguchi, K.
Format: Artikel
Sprache:eng
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Zusammenfassung:Microwave-assisted recording on a 500-Gbpsi-class perpendicular medium was experimentally demonstrated at room temperature. Magnetization reversal under a radio-frequency magnetic field was measured by an electrically shorted coplanar waveguide, which enabled us to evaluate the change in the medium's ferromagnetic resonance spectrum. A frequency-dependent reduction in the switching field was clearly observed in response to a microwave impulse 50 ns in duration. A significant reduction of up to 30% in the coercive field was achieved by applying a microwave impulse with an amplitude of 25 dBm and a frequency of 15 GHz.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4759169