Abstract The current status of CoPtCr–SiO2 granular media is briefly reviewed, and challenges relative to media technology exceeding 1 Tb/in2 are discussed. It is effective to enhance grain isolation using oxide materials that easily precipitate at the grain boundary, and this technique is adopted in commercially available perpendicular recording media. Although some difficulties such as reduction of the grain size retaining the switching field remain, 1 Tb/in2 could be achieved by using granular exchange-coupled composite-type media or related technologies. Discrete track media could be used for more than 1 Tb/in2 recording. It could also take several years to further develop nano-processing technology and establish a cost-effective infrastructure. BPM offers great potential in achieving high recording density, although some necessary technologies are still too primitive to consider commercial production.
[1]
Hiroaki Muraoka,et al.
Pinning of written bits in perpendicular recording media
,
2001
.
[2]
D. Wachenschwanz,et al.
Modeling and design of discrete track recording media
,
2005,
IEEE Transactions on Magnetics.
[3]
Performance evaluation of discrete track perpendicular media for high recording density
,
2005,
INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005..
[4]
Yoichiro Tanaka,et al.
High performance CoPtCrO single layered perpendicular media with no recording demagnetization
,
2000
.
[5]
R. Victora,et al.
Composite media for perpendicular magnetic recording
,
2005,
IEEE Transactions on Magnetics.
[6]
H. Muraoka,et al.
Microstructure and magnetic properties of CoPtCr-SiO/sub 2/ perpendicular recording media
,
2002
.