Magnets are powerful, but they’re also noisy. Not in the way speakers are, but in the way they leak invisible magnetic fields that interfere with anything nearby. This is a serious problem if you’re trying to shrink electronics and pack more functions into tiny spaces.
Now, a team of international researchers at the Technical University of Denmark (DTU) has built something that almost sounds impossible: a magnet that is strong on the inside but nearly invisible on the outside—and it keeps this behavior even above room temperature.
“We now have a material with a very well-ordered magnetic structure, but without the magnetic field that usually causes problems in electronics,” Kasper Steen Pedersen, one of the researchers and a professor at DTU, said.
This unusual combination could change how future electronics are designed, especially in spintronics, where information is carried by the spin of electrons instead of electric charge.
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