학술논문
Microstructure and Magnetic Properties of Exchange-Coupled Co72 Pt28 /Pt/Co81 Ir19 Composite Media for Perpendicular Magnetic Recording.
Document Type
Article
Source
Subject
*MAGNETIC recording media
*MAGNETIC properties
*MAGNETIC anisotropy
*TRANSMISSION electron microscopy
*MASS media use
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Language
ISSN
1557-1939
Abstract
In this work, we report the investigation of microstructure and magnetic properties of the Co72Pt28/Pt/Co81Ir19 exchange-coupled composite (ECC) media using soft-layer (SL) of Co81Ir19 with negative magnetocrystalline anisotropy (MA). Our TEM images show that the hard-layer (HL) exhibits a columnar type microstructure with well-isolated grains and the exchange-coupled SL with hcp-structure show the same texture. Strong coupling of the two layers have been evidenced by the magnetic characterization for all the studied films with Pt inter-layer thickness ranging from 0 to 2 nm. Importantly, these ECC media films have much lower coercivities and much higher thermal stabilities in the favor of high-density magnetic recording. [ABSTRACT FROM AUTHOR]