Title :
Spinstand Measurement of Head Keeper Spacing in Perpendicular Recording
Author :
Jin, Zhen ; Fu, Chengjiang ; Wang, Xiaobin ; Zhou, Yuming ; Fernandez-de-Castro, Juan
Author_Institution :
Seagate Technol., Bloomington, MN
Abstract :
Head keeper spacing (HKS) is an important parameter in the keepered perpendicular magnetic recording. In this paper, a nondestructive method to measure HKS from the playback waveform of a specific recording pattern was proposed. Time and frequency domain techniques can be utilized for the measurements. The measured HKS was shown to be consistent by using different playback harmonic peaks. The effect of head surface potential distribution due to the HKS change was also discussed
Keywords :
frequency-domain analysis; harmonics; magnetic heads; perpendicular magnetic recording; spin waves; time-domain analysis; HKS measurement; frequency domain techniques; head keeper spacing; head surface potential distribution; nondestructive method; perpendicular magnetic recording; playback harmonic peaks; playback waveform; spacing loss; specific recording pattern; spinstand measurement; time domain techniques; Density measurement; Equations; Frequency domain analysis; Frequency measurement; Length measurement; Magnetic heads; Perpendicular magnetic recording; Power measurement; Power system harmonics; Surface waves; Head keeper spacing (HKS); spacing loss;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878634
