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heat assisted magnetic recording (memory) (HAMR)

There are methods with which the storage density ofhard disks can be increased, perpendicular recording, in which the magnetic particles are magnetized perpendicular to the hard disk surface, is one of them, Heat Assisted Magnetic Recording (HAMR) is another.

HAMR combines heating of the hard disk surface with a laser followed by magnetization by a read/write head. Reasons for heating are the magnetic flux density, which has reached its theoretical limits with magnetic write heads and can be significantly reduced by heating.

To achieve greater data density, the memory particles must be reduced in size. There are two approaches to the HAMR process. In one approach, the laser beam heats an area much larger than the track width. In this method, the actual write width is determined by the width of the write head. The other method uses an extremely small laser spot of about 50 nm that determines the write width. The write width of the write head is slightly larger than the dot heated by the laser.

HAMR technology is expected to increase the storage capacity of hard disk drives at least tenfold. Storage capacities between 10 TB and 30 TB are regarded as realistic values.

Englisch: heat assisted magnetic recording (memory) - HAMR
Updated at: 17.04.2018
#Words: 196
Links: storage density, hard disk (HD), magnetic flux density, data, memory
Translations: DE

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