Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
87 (2000), S. 5404-5406
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Baseline popping noise (BLPN) is characterized by the spurious popping of baseline between readback pulses from magnetoresistive/giant MR (MR/GMR) heads. This article focuses on experimental investigation of BLPN from hard-magnet-biased GMR head. It is found that BLPN is sensitive to read bias current in both magnitude and polarity. Also, we found that BLPN is very sensitive to head offset across a written track as a result of interaction between localized BLPN active slice and written track edge. Full-track and microtrack profiling of BLPN is used to substantiate these behaviors. A close-fit model is proposed to further explain the BLPN mechanism. With this model, GMR BLPN is explained by longitudinal hard bias insufficiency on a free layer. When hard bias is not strong enough, due to the demagnetization field, magnetization around edge area rotates either up or down. This skewed magnetization is not stable, a small field will make it flip up and down, which results in jumps in transfer curve and eventually instability in track average amplitude. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.373357
Permalink
|
Location |
Call Number |
Expected |
Availability |
