A yoke magnetoresistive head for high track density recording

For high track density magnetic recording, a new yoke MR head, which has two kinds of yoke elements and center-tapped differential MR elements, has been developed. The track width(2.7μm)of the head is determined by its yoke thickness. Magnetic anisotropy control of the yoke elements and differential MR elements configuration provide low noise and high sensitivity. Output voltage 40μV
p-p
/μm at 25 FRPM and less than -30dB second harmonic distortion were obtained for 3μm recorded track width. Further, C/N values, which is the signal to noise ratio measured with a 10kHz bandwidth, increased by 3dB with differential MR elements configuration. This head has the potential to achieve high track density recording.