Abstract
Figure D.1 shows the major electromechanical components of a magnetic recording rigid disk drive where the most essential element is the rotating disk which is coated with a thin layer of ferromagnetic material. Attached to the back of the self-acting, gas-lubricated, submicron flying slider bearing is a miniaturized recording transducer which consists basically of an electromagnet with a small gap pointing toward the disk surface. Current applied to the coil will generate fringing magnetic field around the gap which causes the magnetic domains in the recording layer to be permanently magnetized. Relative motion between the transducer and the disk surface transforms the time-domain data into magnetic patterns spatially distributed along concentric tracks, allowing the disk to function as a permanent data storage device. During read-back operations, magnetization in the moving disk surface will cause flux changes in the coil which produce back emf, thereby reversing the recording process and transforming the spatial data back into the time domain.
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© 1993 Springer-Verlag New York, Inc.
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Miu, D.K. (1993). Disk Drive Mechatronics. In: Mechatronics. Mechanical Engineering Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-4358-8_14
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DOI: https://doi.org/10.1007/978-1-4612-4358-8_14
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