![]() ![]() ![]() Such large-amplitude, long-distance waves could be well-suited for carrying information, processing data, or driving small motors. Images of the waves taken with x rays show that their amplitude-the angular change in the magnetic alignment over one wave-cycle-can be as large as 25 degrees. These oscillations can be controlled with sound waves, as demonstrated in a new experiment where sound-driven spin waves traveled 6 mm through a magnetic film, which is a longer distance than previous methods achieved. Spin waves-oscillations in the direction of a magnet’s internal alignment-could offer a low-power way to transport information. Spin waves-coordinated tilting of magnetic spins-can be controlled with sound waves, which can send them long distances through a magnetic material. APS/ Alan Stonebraker Teetering back and forth.
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