IEEE Transactions on Magnetics · 2007 · 566 citations · 4 references
Natural SciencesElectrical EngineeringMaterials ScienceElectromagnetismMagnetic MaterialsMicrowave EngineeringAnisotropic MediaMagnetic AnisotropyMagnetic Recording MaterialsMagnetic Thin FilmsMagnetization ProcessesRecording TechniquesCoercivityMagnetic CoercivityMagnetic RecordingPerpendicular Magnetic AnisotropyPerpendicular Magnetic RecordingPerpendicular Magnetic Recording MediaRecording Media CoercivitySaturation
In this paper, we present a novel mechanism for recording at a head held significantly below the medium coercivity in a perpendicular recording geometry. By applying a localized ac field at adequate frequency to the perpendicular recording medium, saturation recording can be achieved with recording field amplitudes significantly below the medium coercivity, or the medium perpendicular anisotropy field. A scheme utilizing spin torque to generate a localized ac field at high frequency (tens of gigahertz) with kilo-oersted field amplitude in the medium is proposed along with a systematic modeling analysis. Recording simulations at high linear densities are presented.
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