HAMR

(redirected from Heat-assisted magnetic recording)
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HAMR

(Heat-Assisted Magnetic Recording) A technique from Seagate for increasing the density of bits on magnetic disks by using a more stable recording medium. In order to write the bit into this medium, a laser heats the area momentarily. HAMR density of one trillion bits per square inch is expected to yield drives with 20, 40 and more terabytes of capacity. See superparamagnetic limit and perpendicular recording.
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References in periodicals archive ?
Silapunt, "Optical field enhancement for heat-assisted magnetic recording system using photonic crystal waveguide," in Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, pp.
Praetorius, "Heat-assisted magnetic recording of bit-patterned media beyond 10 Tb/[in.sup.2]," Applied Physics Letters, vol.
To address these capacity issues, new technology will be required--and that is likely to be heat-assisted magnetic recording (HAMR), which uses electromagnetic energy to locally heat the disk to ease the process of writing data on to it.
Specific topics include modulation coding for a two-dimensional optical storage channel, characterization of heat-assisted magnetic recording channels, Cramer-Rao bound for timing recovery on channels with inter-symbol interference, the faithful communication of genetic information, an information theoretic approach to data storage and processing in cells, coding for optical communications, and macro-molecular data storage with such features as highly parallel read and write operations and three-dimensional storage capacity.