Title :
Comparison of MR and GMR spin-valve heads for magnetic recording on MP tape
Author_Institution :
Storage Technol. Corp., Louisville, CO, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
Shielded magnetoresistive (MR) and giant magnetoresistive spin-valve (SV) tape head performance is compared using square-wave recording on metal particle tape. The relatively large tape medium magnetic thickness drives flux levels that overpower sensitive thin MR elements and SV-free layers. Recording data comparing wide track (20 μm) dual-stripe MR heads and narrow track (3.5 μm) SV heads is shown illustrating SV element saturation at long wavelengths and large reproduce outputs at short wavelengths (7.2 mVp-p at 4000 fr/mm). Measures to counter this observed incompatibility are outlined in terms of media properties, recording method, and SV read-head design.
Keywords :
magnetic heads; magnetic particles; magnetic recording; magnetic tapes; magnetoresistive devices; spin valves; 20 micron; 3.5 micron; GMR spin-valve heads; SV element saturation; flux levels; large reproduce outputs; magnetic recording data; media properties; metal particle tape; narrow track SV heads; particulate tape media; shielded magnetoresistive heads; square-wave recording; tape head performance; tape medium magnetic thickness; wide track dual-stripe MR heads; Counting circuits; Disk drives; Disk recording; Giant magnetoresistance; Magnetic flux; Magnetic heads; Magnetic materials; Magnetic recording; Saturation magnetization; Wavelength measurement;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802808