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Most data are encoded as binary information (0 or 1 respectively) through the orientation of tiny magnets, called spins, in magnetic hard-drives.
The method replaces electricity with extremely short pulses of light -- the duration of which is one trillionth of a second -- concentrated by special antennas on top of the magnet, researchers said.
The new method is not only superfast but also energy efficient as the temperature of the magnet does not increase at all.
Researchers said that the breakthrough was achieved by utilising the efficient interaction mechanism of coupling between spins and terahertz electric field.
A very small antenna on top of the magnet was developed to concentrate and thereby enhance the electric field of light. The strong local electric field is sufficient to navigate the magnetisation of the magnet to its new orientation in just one trillionth of a second.
The temperature of the magnet did not increase at all as this process requires energy of only one quantum of the terahertz light -- a photon -- per spin.
The global electricity consumption for data centres lies between two per cent and five per cent, producing heat which in turn requires more power to cool the servers.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)