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Title: Head-disk system characterization with head itself as transducer
Keywords: Magnetic Recording Systems, Head-Disk Interface, Fly-Height, Read/Write Head, Nonlinearity,
Issue Date: 4-Jul-2006
Citation: ZHOU YIPIN (2006-07-04). Head-disk system characterization with head itself as transducer. ScholarBank@NUS Repository.
Abstract: This dissertation focuses on characterization of high density recording head disk system with reading head as transducer. A simulation platform is developed to study the readback signal based head disk system characterization methods with flexibility of theory model selection and parameters setup. Evaluating of harmonic ratio based FH measurement methods are done based on testing sensitivity and accuracy. Results indicate that the triple harmonic method is of the advantage of high accuracy and repeatability within a wide density range. A novel method is proposed for the quantitative evaluation of the gap length variation among a batch of MR/GMR heads with same structure and similar design based on harmonic analysis of the readback signal. The challenges and problems faced in high density and high data rate recording are discussed. Experimental investigation and theoretical explanation of the possible in-situ testing error caused by nonlinearity effects at high recording density are reported.
Appears in Collections:Master's Theses (Open)

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