Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media

David P. Pappas; A. V. Nazarov; D. Stevenson; Stephen D. Voran; Michael E. Read; E. M. Gormley; Jim Cash; Ken Marr; James J. Ryan

doi:10.1117/1.1866150

1 January 2005 Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media

David P. Pappas, A. V. Nazarov, D. Stevenson, Stephen D. Voran, Michael E. Read, E. M. Gormley, Jim Cash, Ken Marr, James J. Ryan

Author Affiliations +

Journal of Electronic Imaging, Vol. 14, Issue 1, 013015 (January 2005). https://doi.org/10.1117/1.1866150

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.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

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David P. Pappas, A. V. Nazarov, D. Stevenson, Stephen D. Voran, Michael E. Read, E. M. Gormley, Jim Cash, Ken Marr, and James J. Ryan "Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media," Journal of Electronic Imaging 14(1), 013015 (1 January 2005). https://doi.org/10.1117/1.1866150

Published: 1 January 2005

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