198318 ⎘
Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups - or by different subgroups of group ; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording and a beam of light for reproducing, e.g. light-induced thermomagnetic recording, Kerr effect reproducing characterised by the transducing operation to be executed Overwriting or erasing
Sub-classes:Method for manufacturing magneto-optical recording medium
#2Nonvolatile phase change magnetic material, manufacturing method thereof, and nonvolatile phase change magnetic memory using the same
#3Optical storage medium, manufacturing method for optical storage medium, and optical storage device
#4Optical information processing apparatus
#5Magneto-optical storage medium and optical disk drive
#6Method for recording data against ATE and storage medium therefor
#7Storage apparatus, recording medium recording a storage medium destruction program, and storage medium destruction method
#8Optical disk apparatus and method for recording data by utilizing an overwrite technique or a two-path write technique