Magnetic recording medium having a specific relation of...

Details Magnetic recording medium having a specific relation of... Magnetic recording medium having a specific relation of...

2006-05-02

2006-05-02

Faber, Alan T. (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

C360S131000, C428S690000, C369S013410

Reexamination Certificate

active

07038873

ABSTRACT:
A perpendicular magnetic recording medium has a substrate, a magnetic functional layer provided on the substrate, and a magnetic recording layer stacked in contact with the magnetic functional layer and having perpendicular magnetic anisotropy. −4×2πMs2≦Ku≦6×2πMs2is satisfied, wherein Ku represents a perpendicular magnetic anisotropy constant of the magnetic functional layer and Ms represents a saturation magnetization. The magnetic moment of the magnetic functional layer is rotated in a direction of an applied magnetic field during the recording, and the magnetic moment acts on the magnetization of the recording layer in such a manner that the applied magnetic field is assisted thereby. Minute magnetic domains can be stably retained and excellent thermal disturbance resistance can be obtained.

REFERENCES:
patent: 6818331 (2004-11-01), Sakawaki et al.
patent: 6824817 (2004-11-01), Araki et al.
patent: 5-28454 (1993-02-01), None
patent: 2000-315310 (2000-11-01), None
patent: 2002-216333 (2002-08-01), None

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