TY - JOUR
T1 - Influence of thermal relaxation on readback signal in perpendicular magnetic recording
AU - Hashimoto, Mituhiro
AU - Miura, Kenji
AU - Muraoka, Hiroaki
AU - Aoi, Hajime
AU - Nakamura, Yoshihisa
N1 - Funding Information:
This work was supported in part by the IT Program (RR2002) by MEXT, Japanese Government, the Akita Prefecture Collaboration of Regional Entitles for the advancement of Technological Excellence, JST, and SRC. M. Hashimoto was supported by Research Fellowships of the Japan Society for the Promotion of Science (JSPS) for Young scientists.
PY - 2005/10
Y1 - 2005/10
N2 - The influence of thermal relaxation on the readback waveforms from perpendicular magnetic recording media was experimentally investigated in time-domain measurements. The signal decay rate at the magnetization transition was smaller than that in between the transitions, reflecting the demagnetization field distribution. The time dependence of the noise in the waveform was characterized as pulsewidth, transition jitter, and pulsewidth fluctuations. While the transition width decreased with elapsed time, the jitter and pulsewidth fluctuations were stable. These time-dependant results could be interpreted by considering the demagnetizing field distribution near the transitions and in between the transitions, which govern the random magnetization domain reversals.
AB - The influence of thermal relaxation on the readback waveforms from perpendicular magnetic recording media was experimentally investigated in time-domain measurements. The signal decay rate at the magnetization transition was smaller than that in between the transitions, reflecting the demagnetization field distribution. The time dependence of the noise in the waveform was characterized as pulsewidth, transition jitter, and pulsewidth fluctuations. While the transition width decreased with elapsed time, the jitter and pulsewidth fluctuations were stable. These time-dependant results could be interpreted by considering the demagnetizing field distribution near the transitions and in between the transitions, which govern the random magnetization domain reversals.
KW - Media noise
KW - Perpendicular magnetic recording
KW - Thermal relaxation
KW - Time-domain analysis
UR - http://www.scopus.com/inward/record.url?scp=27744480567&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27744480567&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2005.855320
DO - 10.1109/TMAG.2005.855320
M3 - Article
AN - SCOPUS:27744480567
VL - 41
SP - 3085
EP - 3087
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 10
ER -