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What (who) is magneto-optical - definition

ROTATING STORAGE MEDIUM

Magnet optical disc; Magneto-optical; Magneto-optical disc; LIMDOW; Mo disk; Mo drive; Magneto-optic disk; M-O; Magneto-optical disk; Magneto optical storage; Magnetooptical storage; Magneto-optical storage; Magnetooptical data storage; Magneto optical data storage; Magneto-optical data storage; Magnetic optical storage; Magnetic-optical storage; Magnetic-optical data storage; Magnetic optical data storage; MO storage; MO data storage; MO disc; MO discs; MO disks; Magnetooptic storage; Magneto optic storage; Magneto-optic storage; MO drive; MO drives; Magneto optical; MO disk; MO Disc; MO Disk; LIMDOW technology; Magneto optical disk

magneto-optical disk

<hardware, storage> (MO) A plastic or glass disk coated with a compound (often TbFeCo) with special optical, magnetic and thermal properties. The disk is read by bouncing a low-intensity laser off the disk. Originally the laser was infrared, but frequencies up to blue may be possible giving higher storage density. The polarisation of the reflected light depends on the polarity of the stored magnetic field. To write, a higher intensity laser heats the coating up to its Curie point, allowing its magnetisation to be altered in a way that is retained when it has cooled. Although optical, they appear as hard drives to the {operating system} and do not require a special filesystem (they can be formatted as FAT, HPFS, NTFS, etc.). The initial 5.25" MO drives, introduced at the end of the 1980s, were the size of a full-height 5.25" hard drive (like in IBM PC XT) and the disks looked like a CD-ROM enclosed in an old-style cartridge In 2006, a 3.5" drive has the size of 1.44 megabyte diskette drive with disks about the size of a regular 1.44MB floppy disc but twice the thickness. {Storage FAQ (http://cis.ohio-state.edu/hypertext/faq/usenet/arch-storage/part1/faq.html)}. (2006-07-25)

magneto-optical drive

magneto-optical disk

Magneto-optic effect

Magneto-optical effect; Magnetooptics; Magnetooptical effect; Magnetooptical rotation; Magneto-optical rotation; Magneto-optic; Magnetooptical Effect; Magnetooptical Rotation; Magneto-Optics; Gyromagnetic; Gyrotropic; Magneto-optic crystal

A magneto-optic effect is any one of a number of phenomena in which an electromagnetic wave propagates through a medium that has been altered by the presence of a quasistatic magnetic field. In such a medium, which is also called gyrotropic or gyromagnetic, left- and right-rotating elliptical polarizations can propagate at different speeds, leading to a number of important phenomena.

https://en.wikipedia.org/wiki/Magneto-optic_effect

Wikipedia

Magneto-optical drive

A magneto-optical drive is a kind of optical disc drive capable of writing and rewriting data upon a magneto-optical disc. Both 130 mm (5.25 in) and 90 mm (3.5 in) form factors exist. In 1983, just a year after the introduction of the Compact Disc, Kees Schouhamer Immink and Joseph Braat presented the first experiments with erasable magneto-optical Compact Discs during the 73rd AES Convention in Eindhoven. The technology was introduced commercially in 1985. Although optical, they normally appear as hard disk drives to an operating system and can be formatted with any file system. Magneto-optical drives were common in some countries, such as Japan, but have fallen into disuse.

https://en.wikipedia.org/wiki/Magneto-optical drive