Lasers could make hard drives faster, simpler and higher density

(Phys.org) —Researchers at the University of California, San Diego have discovered that for a wide range of ferromagnetic materials the direction of magnetization can be completely controlled by polarized light without the need for magnetic fields, a finding that could significantly affect the data memory and storage industries that produce hard disks and magnetic random access memories. Their research, published Aug. 21 in the journal Science Express, focused on materials currently being developed for high-density storage applications.

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