FePt-Based Exchange-Coupled Composite Perpendicular Recording Media

Author

Sun, Cheng-Jun ; Stafford, Donald ; Acharya, Ramamurthy

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1795

Lastpage

1797

Abstract

In order to demonstrate the strong and proper exchange coupling between bottom magnetic layer and capping magnetic layer in FePt-based exchange-coupled composite (ECC) perpendicular recording media, we have investigated the thermal stability, writability, degree of exchange coupling, and ECC gain factor of FePt-based ECC media as a function of the thickness of the capping FePt layer. With increasing the thickness of capping FePt layer, both thermal stability and media writability increase simultaneously as a result of the change from strong exchange coupling to proper exchange coupling. The proper exchange-coupled FePt ECC is a promising candidate for future high-density perpendicular recording.

Keywords

composite materials; exchange interactions (electron); iron alloys; perpendicular magnetic recording; platinum alloys; thermal stability; FePt; capping magnetic layer; composite perpendicular recording media; exchange coupling; high-density perpendicular recording; thermal stability; writability; Couplings; Grain size; Magnetic anisotropy; Magnetic films; Magnetic recording; Magnetometers; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Sun; Thermal stability; Hard disks; perpendicular magnetic anisotropy; perpendicular magnetic recording; thin films;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2040714

Filename

5467674