Dual-layer patterned media “ledge” design for ultrahigh density magnetic recording
- 14 January 2008
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 92 (2), 022502
- https://doi.org/10.1063/1.2831732
Abstract
Patterned media elements comprising coupled magnetically hard and soft sections of different horizontal size, referred to as ledge elements, are characterized by several unique properties. These elements allow for remarkably reduced reversal fields, which are an order of magnitude below the Stoner-Wohlfarth limit. They also allow for precessional reversal to occur for practical field rise times , which are two orders of magnitude larger than those in the case of homogeneous elements . These attractive properties are obtained even for elements of small height . Patterned media implementing such ledge elements can allow for recording densities above .
Keywords
This publication has 16 references indexed in Scilit:
- Precessional reversal in exchange-coupled composite magnetic elementsApplied Physics Letters, 2007
- Domain wall assisted magnetic recordingApplied Physics Letters, 2006
- Micromagnetics of exchange spring media: Optimization and limitsJournal of Magnetism and Magnetic Materials, 2006
- Exchange spring media for perpendicular recordingApplied Physics Letters, 2005
- Magnetization dynamics and thermal stability in patterned mediaApplied Physics Letters, 2005
- Recording performance of high-density patterned perpendicular magnetic mediaApplied Physics Letters, 2002
- Arrhenius–Néel thermal decay in polycrystalline thin film mediaJournal of Applied Physics, 1999
- Exchange-spring behavior in epitaxial hard/soft magnetic bilayersPhysical Review B, 1998
- High speed coherent switching below the Stoner-Wohlfarth limitIEEE Transactions on Magnetics, 1994
- A mechanism of magnetic hysteresis in heterogeneous alloysPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1948