Title :
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
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 TAF-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 TC 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;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463442
