Dynamic magnetic information storage or retrieval – General recording or reproducing – Thermomagnetic recording or transducers
Reexamination Certificate
2005-08-16
2005-08-16
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Thermomagnetic recording or transducers
C428S690000, C428S690000
Reexamination Certificate
active
06930847
ABSTRACT:
A magnetic recording-reproducing apparatus has a magnetic recording medium having a nonmagnetic substrate, and a functional layer and a recording layer formed on the nonmagnetic substrate, the recording layer exhibiting a magnetic anisotropy energy density KuRL, the functional layer developing ferromagnetism upon irradiation with light so as to exhibit a magnetic anisotropy energy density KuFLlower than the magnetic anisotropy energy density KuRLand the functional layer serving to lower the magnetic anisotropy energy density of the recording layer through exchange coupling interaction with the recording layer when the functional layer is irradiated with light, a light source which irradiates the functional layer with light, and a magnetic head having a writing head writing signal magnetization by applying a magnetic field to the recording layer and a reading head reading the signal magnetization recorded in the recording layer.
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Akiyama Junichi
Kai Tadashi
Kikitsu Akira
Maeda Tomoyuki
Nagase Toshihiko
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Negron Daniell L.
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