Title :
Highly in-plane oriented CoCrPtB longitudinal media for 130-Gb/in2 recording
Author :
Choe, G. ; Zhou, J.N. ; Demczyk, B. ; Yu, M. ; Zheng, M. ; Weng, R. ; Chekanov, A. ; Johnson, K.E. ; Liu, F. ; Stoev, K.
Author_Institution :
MMC Technol., San Jose, CA, USA
fDate :
3/1/2003 12:00:00 AM
Abstract :
A recording density of 130 Gb/in2 was achieved using thermally stable conventional CoCrPtB longitudinal media. The high in-plane orientation ratio (OR) of the media resulted in an excellent recording performance due to a narrow switching field distribution as well as a high thermal stability caused by narrow energy barrier distribution. The low noise is attributed to the fully isolated fine grains with a narrow size distribution. A good in-plane c axis crystallographic texture was achieved by using an optimum multilayered structure of underlayer and magnetic layers. A detailed study of high OR media is reported by characterizing the magnetic, microstructural, and read/write properties.
Keywords :
boron alloys; chromium alloys; cobalt alloys; grain size; magnetic multilayers; magnetic recording noise; magnetic switching; platinum alloys; texture; thermal stability; CoCrPtB; CoCrPtB longitudinal recording medium; areal density; crystallographic texture; energy barrier distribution; grain size distribution; in-plane orientation ratio; magnetic properties; microstructural properties; multilayered structure; noise; read/write properties; switching field distribution; thermal stability; Automatic frequency control; Chromium; Energy barrier; Magnetic anisotropy; Magnetic recording; Perpendicular magnetic anisotropy; Substrates; Surface morphology; Surface texture; Thermal stability;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.808984
