Title :
Investigation on the Effect of an In-Plane Auxiliary Field on the SNR of HAMR Recording Systems
Author :
Hongtao Wang ; Chan Kheong Sann ; Zhimin Yuan ; Pantelis, Sophoclis Alexopoulos
Author_Institution :
Data Storage Inst., Agency for Sci., Technol. & Res., Singapore, Singapore
Abstract :
In this paper, we consider the application of an in-plane auxiliary field into the exchange-coupled composite medium in the heat-assisted magnetic recording (HAMR) system. The dynamic micromagnetic simulations are conducted based on the Landau-Lifshitz-Bloch equations and the signal-to-noise ratio (SNR) characterizations are performed. The effect on the SNR of the HAMR system is investigated. The improvement on the SNR with the auxiliary field in negative downtrack direction is identified.
Keywords :
composite materials; magnetic recording; micromagnetics; HAMR recording systems; Landau-Lifshitz-Bloch equations; SNR; SNR characterizations; dynamic micromagnetic simulations; exchange-coupled composite medium; heat-assisted magnetic recording system; in-plane auxiliary field effect; negative downtrack direction; signal-to-noise ratio; Equations; Heat-assisted magnetic recording; Magnetization; Mathematical model; Media; Micromagnetics; Signal to noise ratio; Heat-assisted magnetic recording (HAMR); magnetic heads; micromagnetic simulation; near-field optical transducer (NFT); signal processing;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2324615
