Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media
نویسندگان
چکیده
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 highresolution MR sensors from commercial hard disk drives. These images can be directly converted into the originally recorded analog audio waveforms or digital data. © 2005 SPIE and IS&T. [DOI: 10.1117/1.1866150]
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ورودعنوان ژورنال:
- J. Electronic Imaging
دوره 14 شماره
صفحات -
تاریخ انتشار 2005