Abstract
Magnetization reversal mechanism in nanostructures composed of exchange coupled bi-layers with in-plane and perpendicular anisotropy was investigated. Micromagnetic simulation was carried out for bit-patterned media with areal density of 5 Tb/in2, as example. Magnetization of thermally stable recorded bit using a single layer may not switch under write field. However, a complete and fast switching is possible with an exchange coupling to a layer with in-plane anisotropy. By adjusting the thicknesses and intrinsic properties of the two layers, the composite recording layer still can retain perpendicular anisotropy. The exchange coupled structure with dual-anisotropy can be extended to magnetic memories.
Original language | English |
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Pages (from-to) | 3963-3966 |
Number of pages | 4 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 321 |
Issue number | 23 |
DOIs | |
Publication status | Published - Dec 2009 |
Externally published | Yes |
Keywords
- Bit-patterned media
- Exchange coupling
- magnetic nanostructures
- magnetization reversal
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics