Title :
Experimental effects of laser power on the writability and PW50 in a heat assisted longitudinal recording system
Author :
Rausch, T. ; Bain, J.A. ; Stancil, D.D. ; Schlesinger, T.E. ; Challener, William A. ; McDaniel, T. ; Deeman, N. ; Brucker, C.
Author_Institution :
Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
Abstract :
In a heat assisted magnetic recording (HAMR) system, light from a laser diode is used to heat the medium which assists in the recording process by temporarily reducing the coercivity during writing. The recorded marks are read back using a magnetoresistive (MR) sensor that senses the stray flux from a magnetic transition. In this paper we examine the effects of the laser power on the writability and the pulse width at half maximum (PW50) for granular longitudinal media.
Keywords :
coercive force; granular materials; heating; laser beam effects; magnetic heads; magnetic transitions; magnetoresistive devices; thermomagnetic recording; MR sensor; coercivity reduction; granular longitudinal media; heat assisted longitudinal recording system; heat assisted magnetic recording system; laser diode heating; laser power effects; magnetic transition stray flux; magnetoresistive sensor; pulse width at half maximum; recorded mark read-back; recording process; writability; Coercive force; Diode lasers; Heat-assisted magnetic recording; Laser transitions; Magnetic flux; Magnetic recording; Magnetic sensors; Magnetoresistance; Power lasers; Writing;
Conference_Titel :
Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on
Print_ISBN :
0-7803-7379-0
DOI :
10.1109/OMODS.2002.1028601
