| 摘要 |
PROBLEM TO BE SOLVED: To provide a magneto-optical recording medium capable of effectively achieving an increase in a Kerr rotation angle, and improvements in a recording density and recording sensitivity by using a simple structure, and a layer structure. SOLUTION: A minute ruggedness structure is formed on a substrate 10 and a magnetic layer 20 is formed thereon. The ruggedness structure 10a is reflected in the magnetic layer 20. With the reflected ruggedness structure, multiple reflection occurs to reproduction laser light. When the multiple reflection occurs to the reproduction laser light, a Kerr rotation action is superimposed each time reflection is repeated at the magnetic layer 20. As a result, an increasing effect on a Kerr rotation angle with respect to the reproduction laser light is expected. Also, with the ruggedness structure reflected in the magnetic layer 20, the surface area of the magnetic layer 20 is increased. Thus, the temperature rise of the magnetic layer 20 by laser light irradiation is increased. Further, since an applied magnetic field is concentrated in the tip end portion of the ruggedness structure, the magnetic field strength of the ruggedness structure is increased. As a result, the recording sensitivity of the magnetic layer 20 with respect to the laser light and the applied magnetic field is increased. COPYRIGHT: (C)2006,JPO&NCIPI
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