Influence of thermal relaxation on readback signal in perpendicular magnetic recording

Mituhiro Hashimoto; Kenji Miura; Hiroaki Muraoka; Hajime Aoi; Yoshihisa Nakamura

doi:10.1109/TMAG.2005.855320

Influence of thermal relaxation on readback signal in perpendicular magnetic recording

Mituhiro Hashimoto, Kenji Miura, Hiroaki Muraoka, Hajime Aoi, Yoshihisa Nakamura

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	3085-3087
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2005.855320
Publication status	Published - 2005 Oct 1

Keywords

Media noise
Perpendicular magnetic recording
Thermal relaxation
Time-domain analysis

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2005.855320

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abstract = "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.",

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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

PY - 2005/10/1

Y1 - 2005/10/1

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

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