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AssigneeSharp Kabushiki Kaisha
InventorsJunsaku Nakajima, Akira Takahashi, Junji Hirokane, Yoshiteru Murakami, Kenji Ohta
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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.
An information reproduction apparatus comprising:
An information reproducing apparatus comprising:
An information reproducing apparatus comprising:
An information recording-reproduction method for recording or reproducing information by using a magnetic recording medium consisting essentially of a base and a recording layer composed of a ferrimagnetic material formed on the base, the ferrimagnetic material having a compensation temperature that is substantially equal to room temperature, comprising the steps of:
An information reproduction method for reproducing information from a magnetic recording medium consisting essentially of a base having a light transmission property and a recording layer composed of a ferrimagnetic material formed on the base, the ferrimagnetic material having a compensation temperature that is virtually equal to room temperature with its saturated magnetization being set to have a maximum value at a temperature in a range of 160.degree. C. to 240.degree. C., the information reproduction method comprising the steps of:
An information re producing method for reproducing information from a magnetic recording medium consisting essentially of a base and a recording layer composed of a ferrimagnetic material formed on the base, the ferrimagnetic material having a saturated magnetization that is set to have a maximum value at a temperature in a range of 160.degree. C. to 240.degree. C., the information reproducing method comprising steps of:
Dependencies are inferred from the claim text.