Heat Assisted Magnetic Recording with Matching Media and Recording Head Field  

作　　者：LIAO Jia-Lin WEI Shen-Jin LI Jing JIN Qing-Yuan CHE Xiao-Dong 

机构地区：[1]Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Laboratory of Advanced Materials and Department of Optical Science and Engineering, Fudan University, Shanghai 200433 [2]Hitachi Global Storage Technologies, San Jose, CA, USA

出　　处：《Chinese Physics Letters》2010年第6期258-261,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 60490290, 60678008, 10604016, 50771032, a.nd 5C1771{}33. the National Basic Research Program of China under Grant No 2009CB929201.

摘　　要：The dynamic performance of heat assisted magnetic recording （HAMR） on different media is investigated. Signal and signal-to-noise ratio enhancement are achieved in high coereivity perpendicular media with the aid of laser heating. Linear recording density is increased while saturation write current is lowered. Trailing field partial erasure is observed in lower coercivity media with a ring head, which causes signal reduction with increasing write current or application of a laser. Precautions should be taken against partial erasure in overall recording system optimization of HAMR in order to achieve ultrahigh recording density.The dynamic performance of heat assisted magnetic recording （HAMR） on different media is investigated. Signal and signal-to-noise ratio enhancement are achieved in high coereivity perpendicular media with the aid of laser heating. Linear recording density is increased while saturation write current is lowered. Trailing field partial erasure is observed in lower coercivity media with a ring head, which causes signal reduction with increasing write current or application of a laser. Precautions should be taken against partial erasure in overall recording system optimization of HAMR in order to achieve ultrahigh recording density.

分 类 号：TN762[电子电信—电路与系统] TN646