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Terahertz electrical writing speed in an antiferromagnetic memory

Olejník, Kamil; Seifert, Tom; Kašpar, Zdeněk; Novák, Vít; Wadley, Peter; Campion, Richard P.; Baumgartner, Manuel; Gambardella, Pietro; Němec, Petr; Wunderlich, Joerg; Sinova, Jairo; Kužel, Petr; Müller, Melanie; Kampfrath, Tobias; Jungwirth, Tomas

Authors

Kamil Olejník

Tom Seifert

Zdeněk Kašpar

Vít Novák

PETER WADLEY PETER.WADLEY@NOTTINGHAM.AC.UK
Principal Research Fellow

Manuel Baumgartner

Pietro Gambardella

Petr Němec

Joerg Wunderlich

Jairo Sinova

Petr Kužel

Melanie Müller

Tobias Kampfrath

TOMAS JUNGWIRTH tomas.jungwirth@nottingham.ac.uk
Research Professor of Ferromagnetic Semiconductors



Abstract

© 2018 American Association for the Advancement of Science. All rights reserved. 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.

Journal Article Type Article
Publication Date Mar 2, 2018
Journal Science Advances
Electronic ISSN 2375-2548
Publisher American Association for the Advancement of Science
Peer Reviewed Peer Reviewed
Volume 4
Issue 3
Article Number eaar3566
APA6 Citation Olejník, K., Seifert, T., Kašpar, Z., Novák, V., Wadley, P., Campion, R. P., …Jungwirth, T. (2018). Terahertz electrical writing speed in an antiferromagnetic memory. Science Advances, 4(3), https://doi.org/10.1126/sciadv.aar3566
DOI https://doi.org/10.1126/sciadv.aar3566
Publisher URL https://advances.sciencemag.org/content/4/3/eaar3566

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