Pseudo-binary alloys and exchange springs: a review of media concepts for thermally assisted magnetic recording

Author

Thiele, Jan-Ulrich

Author_Institution

San Jose Res. Center, Hitachi Global Storage Technol., San Jose, CA, USA

fYear

2005

fDate

4-8 April 2005

Firstpage

27

Lastpage

28

Abstract

An overview of media properties and their influence on the recording process in thermally assisted magnetic recording (TAR) will be given. A novel media scheme using exchange coupled FePt/FeRh bi-layers that attempts to circumvent some of the limitations encountered by ´simple´ ferromagnetic media will be discussed. Utilizing the exchange spring behavior of the bi-layer above T_AF-FM, this concept allows reversal of the magnetization of the FePt layer in fields comparable to those provided by current write heads at temperatures considerably lower than T_C of FePt without compromising the thermal stability of the storage layer.

Keywords

Morin temperature; antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; ferromagnetic-antiferromagnetic transitions; interface magnetism; iron alloys; magnetisation reversal; platinum alloys; rhodium alloys; thermal stability; thermomagnetic recording; FePt-FeRh; exchange coupled FePt/FeRh bi-layers; exchange spring behavior; exchange springs; ferromagnetic media; media concepts; media properties; pseudobinary alloys; recording process; reversal of the magnetization; storage layer; thermal stability; thermally assisted magnetic recording; write head; Anisotropic magnetoresistance; Heat-assisted magnetic recording; Magnetic anisotropy; Magnetic films; Magnetic materials; Magnetosphere; Perpendicular magnetic anisotropy; Springs; Temperature dependence; Thermal stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463442

Filename

1463442