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Department of Physics

Swiftly switched spins stay cool

Artistic impression of a spin on a plane of binary numbers © Christoph Lange​/​TU Dortmund

Information technology has to be ever faster and more compact. Yet this challenge comes with a price: Performing a task more rapidly costs more energy. In collaboration with the group of Prof. Dr. Rupert Huber (Regensburg), Prof. Dr. Rostislav Mikhaylovskiy, Prof. Dr. Alexey Kimel (Radboud University, Nijmegen) and Prof. Dr. Anatoly Zvezdin (Russian Academy of Sciences, Moscow) we employed ultrashort terahertz pulses to demonstrate the least-dissipative ultrafast magnetic recording to date and to explore its unique properties. The results are an enabling step towards a new generation of information technology which aims to unite maximal energy efficiency and speed.

The results are reported in Nature 569, 383-387 (2019).