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Terahertz electrical writing speed in an antiferromagnetic memory

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Olejnik K., Seifert T., Kaspar Z., Novak V., Wadley P., Campion R. P., Baumgartner M., Gambardella P., Nemec P., Wunderlich J., Sinova J., Kuzel P., Muller M., Kampfrath T., Jungwirth T.,
Project Spin-orbitronics in ferromagnets and antiferromagnets
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Original article (peer-reviewed)

Journal Science Advances
Volume (Issue) 4(3)
Page(s) 3566 - 3566
ISBN 2375-2548
Title of proceedings Science Advances
DOI 10.1126/sciadv.aar3566

Open Access

URL https://advances.sciencemag.org/content/4/3/eaar3566
Type of Open Access Publisher (Gold Open Access)

Abstract

The speed of writing of state-of-the-art ferromagnetic memories is physically limited by an intrinsic gigahertz threshold. Recently, realization of memory devices based on antiferromagnets, in which spin directions periodically alternate from one atomic lattice site to the next has moved research in an alternative direction. We experimentally demonstrate at room temperature that the speed of reversible electrical writing in a memory device can be scaled up to terahertz using an antiferromagnet. A current-induced spin-torque mechanism is responsible for the switching in our memory devices throughout the 12-order-of-magnitude range of writing speeds from hertz to terahertz. Our work opens the path toward the development of memory-logic technology reaching the elusive terahertz band.
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