DISCONTINUOUS ISLANDED FERROMAGNETIC RECORDING FILM WITH PERPENDICULAR MAGNETIC ANISOTROPY
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United States of America Patent
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Issued Date -
Jul 14, 2011
app pub date -
Apr 5, 2010
filing date -
Jan 8, 2010
priority date (Note) -
Abandoned
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Abstract
The present invention discloses a discontinuous islanded ferromagnetic recording film with perpendicular magnetic anisotropy. The discontinuous islanded ferromagnetic recording film includes a substrate and a ferromagnetic layer. The ferromagnetic layer is formed on the substrate and annealed by a high-temperature vacuum annealing process. After annealing, a surface energy difference existed between the ferromagnetic layer and the substrate turns the ferromagnetic layer into well-separated and discontinuous islanded ferromagnetic particles. Each islanded ferromagnetic particle is thought of a single magnetic domain, which is beneficial to achieve a discontinuous islanded ferromagnetic recording film with perpendicular magnetic anisotropy.
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