A group of international scientists discovered a magnetic system to transform heat into motion. These techniques help in nanoscale devices for data storages and sensors in future.
The study organized by team, among them Professor Gino Hrkac from the University of Exeter, developed magnetic system known as ratchet. It separates thermal energy with a specific gear. The magnetic system built with artificial spin ice material. It contains tiny magnets 200 times smaller than human hair. Magnets created with nickel-iron alloy Permalloy.
The scientists made magnetic energy into rotation of magnetization. During the process rotations occurred only in two directions.
The research author Sebastian Gliga from University of Glasgow, recalls “The system we have studied is an artificial spin ice. A class of geometrically frustrated magnetic materials. Surprised to see that the geometry of the interactions can be tailored. To achieve an active material that acts as a ratchet.”
Professor Gino Hrkac says “We tried to understand for quite some time how the system worked before realized that the edges created an asymmetric energy potential.” This asymmetry is reflected in the distribution of the magnetic field. At the boundaries of the nanomagnet array and causes the magnetization to rotate in a preferred direction.
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