An international team of scientists has demonstrated a revolutionary new method of magnetic recording, which will speed up the processing of information in hundreds of times, in comparison with the speed of today’s hard drives.
Researchers have found a way to record information using only heat, as previously unimagined even. They believe that this discovery will not only speed magnetic recording device, but also to make them more energy efficient.
The results of the study, which was conducted by the Department of Physics, University of York, were published in the journal Nature Communications.
York physicist Thomas Ostler said: "Instead of recording information on a magnetic medium with a magnetic field, we have opened a much stronger internal forces to record information using only heat. This revolutionary method enables you to record terabytes (thousands of gigabytes) of data in a matter of seconds, which is hundreds of times faster than today’s hard drives. Since we do not use the magnetic field, the energy consumption is reduced. "
This international team included scientists from Spain, Switzerland, Ukraine, Russia, Japan and the Netherlands. Experimental studies conducted in the Paul Scherrer Institute in Switzerland, the Physico-Technical Institute. AF Ioffe RAS in Russia, and the University of Nijmegen in the Netherlands.
Dr. Alexey Kimel, from the Netherlands, said: "For centuries it was believed that heat can only destroy the magnetic ordering. Now we have successfully demonstrated that it can be used to record information on the magnetic media."
At the heart of modern technology of magnetic recording based on the principle of attraction of opposite charges and the mutual repulsion of like charges. Up until this discovery, it was thought that to write one bit of information to the external magnetic field. The stronger the field, the faster the recording of magnetic bits of information.
This team of scientists were able to show that the relative position of the north and south poles of a magnet can be changed using ultrashort heat pulse, which uses a much more powerful internal forces of magnetic media.