R&D: Study on HAMR RW Channel Models for Double Layer Magnetic Recording

Japanese Journal of Applied Physics has published an article written by Yasuaki Nakamura, Ehime University, Matsuyama, Ehime, Japan, Madoka Nishikawa, Ehime University, 3, Bunkyo-cho, Matsuyama, 790-8577, Japan, Simon Greaves, RIEC, Tohoku University, Katahira 2-1-1, Aoba ku, Sendai, 980-8577, Japan, Yasushi Kanai, Department of Engineering, Niigata Institute of Technology, 1719 Fujihashi, Kashiwazaki, Niigata-ken, 945-1195, Japan, and Yoshihiro Okamoto, Ehime University, Matsuyama, Ehime, Japan.

Abstract: “Three-dimensional (3D) magnetic recording with multiple recording layers has garnered considerable attention as a next-generation magnetic recording method that uses dual conventional recording layers and a magnetoresistive (MR) head for reading. In this work, to examine signal processing methods for the 3D magnetic read/write (R/W) channel using heat-assisted magnetic recording (HAMR), we have constructed a HAMR R/W channel using a granular media model. Our 3D HAMR R/W channel model, specialized for signal processing development, can account for the Curie temperatures of the recording layers and the temperature distribution of the heat source.“