Spin loss utilization approach could improve spintronics devices
A recent study by teams from the Korea Institute of Science and Technology (KIST), DGIST, Yonsei University, Seoul National University, University of Kashmir, Kunsan National University and Johannes Gutenberg University Mainz presented a device principle that can utilize “spin loss,” which was previously thought of as a simple loss, as a new power source for magnetic control. The team’s discovery could offer a new approach to significantly improving the efficiency of spintronics devices.
The team identified a new physical phenomenon that allows magnetic materials to spontaneously switch their internal magnetization direction without external stimuli. Magnetic materials are key to the next generation of information processing devices that store information or perform computations by changing the direction of their internal magnetization. For example, if the magnetization direction is upward, it is recognized as ’1′, and if it is downward, it is recognized as ’0′, and data can be stored or computed. Traditionally, to reverse the direction of magnetization, a large current is applied to force the spin of electrons into the magnet. However, this process results in spin loss, where some of the spin does not reach the magnet and is dissipated, which has been considered a major source of power waste and poor efficiency.
Source: https://www.spintronics-info.com/spin-loss-utilization-approach-could-improve-spintronics-devices
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