Perpendicular magnetic recording medium

A perpendicular magnetic recording medium is provided. The perpendicular magnetic recording medium includes: a perpendicular magnetic recording layer formed on a substrate; and at least one soft magnetic under-layer formed between the substrate and the perpendicular magnetic recording layer, wherein...

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Bibliographic Details
Main Authors LEE HOO SAN, OH HOON SANG, KONG SOK HYUN, YOON SEONG YONG
Format Patent
LanguageEnglish
Published 09.04.2013
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:A perpendicular magnetic recording medium is provided. The perpendicular magnetic recording medium includes: a perpendicular magnetic recording layer formed on a substrate; and at least one soft magnetic under-layer formed between the substrate and the perpendicular magnetic recording layer, wherein the soft magnetic under-layer is made from an alloy of a non-magnetic material and a magnetic material which exists in the form of granular nanoparticles in matrix of the non-magnetic material, and at least two of the magnetic nanoparticles are spaced apart from one another by a predetermined distance so as to mutually make an anti-ferromagnetic coupling.
Bibliography:Application Number: US20060643775