Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jmmm.2006.01.217
Title: Evaluation of gap length fluctuation with harmonic analysis method
Authors: Zhou, Y.
Liu, B.
Li, L. 
Keywords: Gap length evaluation
Magnetic integration
Magnetic readback signal
Magnetic recording
Issue Date: Aug-2006
Source: Zhou, Y., Liu, B., Li, L. (2006-08). Evaluation of gap length fluctuation with harmonic analysis method. Journal of Magnetism and Magnetic Materials 303 (2 SPEC. ISS.) : e18-e22. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2006.01.217
Abstract: Gap length (GL) of reading head is one of the most critical parameters for high-density magnetic recording systems. A novel method is proposed for quantitative evaluation of the GL fluctuation among a batch of magneto-resistive/giant magneto-resistive heads with same structure design. The method works at head-gimbal assembly level and the evaluation can be done with any read/write analysis equipment. The testing process is based on harmonic analysis of the readback signal. The testing system consists of a selected reference head and sample heads for evaluation. A GL variation function is introduced for the evaluation of GL deviation between the reference head and sample head. This method proved to be easy for implementation and results suggest that variation of GL is considerable and has obvious effect on recording performance in high recording density systems. © 2006 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/55917
ISSN: 03048853
DOI: 10.1016/j.jmmm.2006.01.217
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