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Journal of Electronic Imaging

Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media
Author(s): David P. Pappas; A. V. Nazarov; D. Stevenson; Stephen D. Voran; Michael E. Read; E. M. Gormley; Jim Cash; Ken Marr; James J. Ryan
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Paper Abstract

A scanning magnetoresistive (MR) microscope is developed for high-resolution imaging of magnetic tapes and digital media. Second-harmonic detection is used to remove thermal anomalies. We are able to image sufficient lengths of tape for authentication purposes and for data recovery from damaged samples. The second-harmonic technique provides high-contrast magnetic images of the magnetic storage media using high-resolution MR sensors from commercial hard disk drives. These images can be directly converted into the originally recorded analog audio waveforms or digital data.

Paper Details

Date Published: 1 January 2005
PDF: 6 pages
J. Electron. Imaging. 14(1) 013015 doi: 10.1117/1.1866150
Published in: Journal of Electronic Imaging Volume 14, Issue 1
Show Author Affiliations
David P. Pappas, National Institute of Standards and Technology (United States)
A. V. Nazarov, National Institute of Standards and Technology (United States)
D. Stevenson, National Institute of Standards and Technology (United States)
Stephen D. Voran, Institute for Telecommunication Sciences (United States)
Michael E. Read, Physical Sciences Inc. (United States)
E. M. Gormley, National Transportation Safety Board (United States)
Jim Cash, National Transportation Safety Board (United States)
Ken Marr, Federal Bureau of Investigation Academy (United States)
James J. Ryan, Federal Bureau of Investigation Academy (United States)


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