Title :
Amplitude and asymmetry correlation study between quasistatic and dynamic electrical testing of MR sensors
Author :
Zhu, Jun ; Loera, Moises
Author_Institution :
Phase Metrics Inc., San Diego, CA, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
The peak amplitudes of a shielded MR sensor are shown to be well correlated over a wide range of hard-axis magnetic fields and bias currents between quasi-static and dynamic electrical testing. The peak asymmetry correlation appears to be head design specific. Write disturbances significantly increase the standard deviation of the amplitude and asymmetry repeatability measurements. The presence of a small dc easy-axis magnetic field has little effect on MR responses to uniform fields
Keywords :
correlation methods; magnetic heads; magnetic sensors; magnetoresistive devices; testing; asymmetry correlation; bias currents; dynamic electrical testing; hard-axis magnetic fields; head design; peak amplitude; quasistatic electrical testing; shielded magnetoresistive sensor; write disturbances; Current measurement; Magnetic field measurement; Magnetic heads; Magnetic recording; Magnetic sensors; Magnetic shielding; Permanent magnets; Pulse measurements; Testing; Time measurement;
Journal_Title :
Magnetics, IEEE Transactions on
