Magnetic recording medium and magnetic recording system using su

Details Magnetic recording medium and magnetic recording system using su Magnetic recording medium and magnetic recording system using su

1998-03-25

2000-06-27

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428694T, 428694TS, 428694TM, 428694R, 428900, 360113, 324252, G11B 566

Patent

active

060804769

ABSTRACT:
It is an object of the present invention to provide a magnetic recording medium which has a magnetic layer deposited on a substrate through a single-layer underlayer or a multilayer-underlayer, the magnetic layer includes magnetic crystal grains having an acicular structure or amorphous magnetic particles, an average grain size of the magnetic grain and a grain-size dispersion normalized by the average grain size are less than 16 nm and less than 0.5, respectively, a value Ku.multidot.v/kT which results from dividing a product of a magnetic anisotropy constant Ku and a volume v of the magnetic grain by a product of a Boltzmann constant k and an absolute temperature T is selected to be greater than 60, and a film thickness of the magnetic layer falls within twice of the average grain size. Thus, there can be realized a magnetic recording system in which a media noise can be reduced, a high S/N and a low bit error rate can be obtained and which has a high recording density of 2 gigabits per one square inches and an MTBF (mean time between failure) of higher than 300000 hours.

REFERENCES:
J. Appl. Phys. vol. 63(8), Apr. 15, 1988, pp. 3248-3253, "Magnetic studies of thin metallic films", J. G. Zhu et al.
J. Appl. Phys. vol. 79(8), Apr. 15, 1996, pp. 5339-5341 "Dependence of media noise on grain size and intergranular coupling in thin-film media" A. Kikuchi et al.
IEEE Transactions on Magnetics, vol. 30, No. 6, Nov. 1994, pp. 4230-4232, "Thermal instability at Gbit/in.sup.2 magnetic recording" Pu-Ling La et al .

Affiliated with

Also associated with

Rating

Magnetic recording medium and magnetic recording system using su does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic recording medium and magnetic recording system using su, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording medium and magnetic recording system using su will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1782366