A strategy for high-density perpendicular magnetic recording with a soft underlayer is introduced. The approach is based on three concepts: 1) the nonzero magnetic susceptibility of the recording layer; 2) the use of intergranular exchange to partially cancel magnetostatic effects; and 3) a novel head architecture. Micromagnetic simulations involving recording head, soft underlayer, and recording layer are employed to specify a particularly advantageous design. It is shown that the expected density approaches 1 Tbit/in2.
|Original language||English (US)|
|Number of pages||6|
|Journal||IEEE Transactions on Magnetics|
|Issue number||5 I|
|State||Published - Sep 2002|
|Event||2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands|
Duration: Apr 28 2002 → May 2 2002
Bibliographical noteFunding Information:
Manuscript received February 14, 2002. This work was supported in part by Seagate, Singapore, the National Storage Industry Consortium, and the National Science Foundation under Contract DMR-9971573. The authors are with the Department of Electrical and Computer Engineering, Center for Micromagnetics and Information Technologies, University of Minnesota, Minneapolis, MN 55455 USA (e-mail: firstname.lastname@example.org). Digital Object Identifier 10.1109/TMAG.2002.802791.
- High-density perpendicular recording
- Intergranular exchange