Thermally assisted recording system

Details Thermally assisted recording system Thermally assisted recording system

2008-10-02

2010-10-12

Mercedes, Dismery E (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

C360S062000, C360S135000, C428S817000, C428S829000, C428S836100

Reexamination Certificate

active

07813071

ABSTRACT:
A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic intergrain exchange coupling is large to let the magnetization be thermally stable by coupling the magnetic grains constituting the recording layer at room temperature (the temperature maintaining the magnetization) and reduced by heating during recording to let the recording magnetization transition slope become steep. Parameter A normalizing the slope around the coercivity of the MH-loop of the medium is 1.5≦A<6.0 at room temperature, and it becomes approximately 1.0 with heating.

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