Simulation Analysis of Thermal Decay and Read-Write Characteristics Depending on the Structure of Sputtered Tape Media

We developed a magnetic recording simulator that takes into account thermal agitation by employing a probabilistic switching model based on the Arrhenius-Neel equation. Using this simulator, we investigated the impact of Capped and Hk-Graded media on sputtered perpendicular media for magnetic tape recording. Our simulation results were in good agreement with the experimental data, as evidenced by the consistency of the
$M$
–
$H$
curves and read-write characteristics. Specifically, we found that the use of Capped media enhances writability, but it also increases the transition noise, while Graded media has no significant effect on writability. Furthermore, our thermal decay simulation showed a correlation between the reproduction output decay and the
$M_{r}/M_{s}$
decay, and no clear relationship between the media signal-to-noise ratio (SNR) decay over time and the media
$K_{u}V/k_{B}T$
. These findings illustrate the potential of our simulator as a valuable tool for designing magnetic media.