Title :
Writability enhancement using exchange spring media
Author :
Supper, Natacha ; Fullerton, Eric E. ; Margulies, David T. ; Moser, Andreas ; Do, Hoa ; Berger, Andreas
Author_Institution :
GST San Jose Res. Center, Hitachi, San Jose, CA, USA
Abstract :
Longitudinal exchange-spring media, which consist of a low anisotropic (soft) layer (CoCrX) on top of a high anisotropic (hard) layer (CoPtCrB) separated by a ferromagnetic coupling layer (CoRu), was evaluated. It is found out that this structure has improved writing properties as well as an increased signal while maintaining signal to noise ratio (S0NR) in longitudinal antiferromagnetically-coupled (AFC) media. The magnetization versus field loop was obtained using SQUID magnetometer. The recording performance was also evaluated using a Guzik spinstand.
Keywords :
antiferromagnetic materials; chromium compounds; cobalt alloys; cobalt compounds; exchange interactions (electron); ferromagnetic materials; magnetic hysteresis; magnetic recording; magnetic thin films; platinum compounds; ruthenium alloys; Guzik spinstand; SQUID magnetometer; antiferromagnetically-coupled media; ferromagnetic coupling layer; field loop; longitudinal exchange-spring media; magnetization; recording performance; signal to noise ratio; writability enhancement; writing properties; Anisotropic magnetoresistance; Automatic frequency control; Grain size; Magnetic heads; Magnetization; Signal to noise ratio; Springs; Stability; Switches; Writing;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464299
