Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1997-08-11
2000-11-07
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428694SC, 428694MM, 428694EC, 428900, 368 13, 360110, 360114, G11B 566
Patent
active
061434361
ABSTRACT:
A magnetic recording medium having a recording layer made up of a ferrimagnetic material whose compensation temperature is included within room temperatures and an information recording-reproduction method using the magnetic recording medium. During recording, while a light beam is projected on the recording layer so as to raise the temperature of a recording portion, information is recorded by applying a signal magnetic field from a magnetic head. During reproduction, while a light beam is projected on a reproducing portion of the recording layer so as to raise the temperature thereof, information is reproduced by detecting leakage flux from the reproducing portion by the magnetic head. Thus, during reproduction, no magnetic flux is generated from other portions of the recording layer not irradiated by the light beam. With the arrangement, crosstalk due to leakage flux from adjoining tracks not irradiated by the optical beam can be eliminated. Therefore, track pitches can be made narrower so as to increase recording density of the magnetic recording medium. Further, since crosstalk from adjoining tracks is eliminated, a high S/N can be achieved.
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patent: 4926402 (1990-05-01), Masakawa
patent: 5055353 (1991-10-01), Yamamoto et al.
patent: 5475658 (1995-12-01), Takahashi et al.
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European Search Report, mailed Jan. 1992 for corresponding application.
Nomura, et al., "Proposed Magneto-Optic Video Recording Systems Using Thermoremanet Techniques" 1979, pp. 21-28 and abstract thereof.
Hirokane Junji
Murakami Yoshiteru
Nakajima Junsaku
Ohta Kenji
Takahashi Akira
Conlin David G.
Daley, Jr. William J.
Kiliman Leszek
Sharp Kabushiki Kaisha
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