Title :
Simulations of recording in composite media
Author :
Greaves, S. ; Muraoka, H.
Author_Institution :
Tohoku Univ., Sendai
Abstract :
In this paper, the recording performance of two types of media are compared by calculating the head field distribution of an 80 nm wide write pole in conjunction with a soft magnetic underlayer. The maximum effective field was inclined 15deg from the perpendicular axis. The effective head field gradient was a maximum when the head field was inclined 35deg from the perpendicular. Composite media have some advantages over single layer media. However, the difference in Hc(thetas) at the angle where recording takes place is much less than the difference in Hc(0). As a result, a significant reduction in the grain size, while increasing the uniaxial anistropy, Ku to maintain thermal stability, will not be possible as the media will become unwriteable.
Keywords :
coercive force; composite materials; grain size; magnetic anisotropy; magnetic heads; magnetic multilayers; magnetic recording; magnetic thin films; soft magnetic materials; storage media; thermal stability; coercivity; composite recording media; effective head field gradient; grain size; head field distribution; size 80 nm; soft magnetic underlayer; thermal stability; uniaxial anistropy; write pole; Coercive force; Energy barrier; Grain size; Magnetic anisotropy; Magnetic heads; Magnetic recording; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization; Soft magnetic materials;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.375834