DNA (Bangalore edition)
French physicists said on Sunday they had used ultra-fast lasers that could accelerate storage and retrieval of data on hard discs by up to 100,000 times, pointing the way to a new generation of IT wizardry.
The research builds on achievements that earned the 2007 Nobel physics prize for Albert Fert of France and Peter Gruenberg of Germany, who ushered in a revolution in miniaturised storage in the 1990s. Fert and Gruenberg discovered that tiny changes in magnetic fields can yield a large electric output. These differences in turn cause changes in the current readout head that scans a hard disk to spot the ones and zeroes in which data is stored.
That discovery opened the way to "spintronics", a form of electronics that uses not only electrical charge but also the spin of electrons in individual atoms to provide a more compact, denser storage on hard drives. But reading and writing data through spintronics has been hampered by the relative slowness of magnetic sensors
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