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Light changes a magnet’s polarity

Moire Portrait

The researchers used a laser pulse (blue) to change the polarity of a ferromagnetic state in a special material consisting of twisted atomic layers (red). (Illustration: Enrique Sahagún, Scixel / University of Basel, Department of Physics)

A team of researchers led by BQC Prof. Dr. Tomasz Smoleński and Prof. Dr. Ataç Imamoğlu at the ETH in Zurich have succeeded in changing the polarity of a special ferromagnet using a laser beam. In the future, this method could be used to create adaptable electronic circuits with light.

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