Title :
SNR Impact of Media Anisotropy Near Curie Temperature in Heat-Assisted Magnetic Recording
Author :
Yiming Wang ; Jian-Gang Zhu
Author_Institution :
Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA
Abstract :
Heat-assisted magnetic recording utilizes material with drastically changing crystalline anisotropy during the heating and cooling process. In this paper, the impact of media anisotropy near Curie temperature on medium signal-to-noise ratio (SNR) is systematically studied. Results show that the combination of proper gradient of anisotropy versus temperature and thermal profile is crucial to achieving satisfactory SNR and recording areal density.
Keywords :
Curie temperature; magnetic anisotropy; magnetic recording noise; micromagnetics; Curie temperature; cooling; crystalline anisotropy; heating; magnetic recording; magnetization; micromagnetic modeling; signal-to-noise ratio impact; Anisotropic magnetoresistance; Heat-assisted magnetic recording; Heating; Media; Saturation magnetization; Signal to noise ratio; Temperature; Curie temperature; heat-assisted magnetic recording (HAMR); signal-to-noise ratio (SNR);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2154314
