IEEE Transactions on Magnetics · 1984 · 32 citations · 8 references
Thin Film PhysicsEngineeringThermomagnetic RecordingThin Film Process TechnologyMagnetic MaterialsMagnetismMagnetic Data StorageDynamic Read/write CharacteristicsOptical PropertiesAmorphous Ternary TbfecoThin Film ProcessingMaterials ScienceMaterials EngineeringPhysicsSpintronicsNatural SciencesApplied PhysicsThin FilmsMagnetic DeviceAmorphous SolidReadout Experiments
Amorphous ternary TbFeCo and DyFeCo alloy films were prepared on PMMA pregrooved disks with a dielectric surface layer by Electron-Beam Evaporation technique. Thermomagnetic recording and readout experiments were carried out on these disks using magneto-optical disk player with a detector of Si-APD. It was found that S/N, proportional to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\sqrt{R}\cdot\Theta_{k}</tex> , is dependent on the thickness of dielectric layer both theoretically and experimentally, where the optimum thickness exists. The mean value of carrier-to-noise ratio (C/N) of 53 dB (resolution bandwidth 30 KHz) was obtained at 2.048 Mb/s (NRZ), which was 5dB larger than that of the disk without a dielectric layer.
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