198332 ⎘
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; Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
Bolometer for internal laser power monitoring in heat-assisted magnetic recording device
#2Bolometer for internal laser power monitoring in heat-assisted magnetic recording device
#3Enhanced data storage and retrieval devices and systems and methods for utilizing same
#4Domain stabilized magneto-optic head
#5Magnetic sensor
#6Decision-free timing disturbance cancellation caused by HAMR laser power variation