NDLI: Spinstand Measurement of Head Keeper Spacing in Perpendicular Recording

Content Provider	IEEE Xplore Digital Library
Author	Jin, Z. Fu, C. Zhou, Y. Fernandez-de-Castro, J.
Copyright Year	2006
Description	Author affiliation: Seagate Technol., Bloomington (Jin, Z.; Fu, C.; Zhou, Y.; Fernandez-de-Castro, J.)
Abstract	We have developed a method to measure HKS from the playback waveform from a specific recording pattern.In the current high-density perpendicular magnetic recording system, the head air-bearing surface (ABS) to soft under-layer (SUL) surface, or so called head keeper spacing (HKS) is one of the key parameters that affect both writer field strength as well as playback process. Here we describe the principle and procedure we used to infer HKS from measurement. The result on HKS using 1st and.3rd signal harmonics is discussed and rechecked with that using 1st and 5th harmonics. The effect of head surface potential change due to the HKS variation. As the head media spacing (HMS) and thus HKS is reduced with increased areal density, its impact on system performance will be more significant. Thus, the measurement of HKS is important.
Starting Page	446
Ending Page	446
File Size	237908
Page Count	1
File Format	PDF
ISBN	1424414792
DOI	10.1109/INTMAG.2006.376170
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Intermag Conference
Subject Keyword	Magnetic heads Perpendicular magnetic recording Frequency measurement Magnetic field measurement Density measurement Power measurement Equations Bandwidth Time measurement System performance
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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