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Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe

Kriegner, D.; V�born�, K.; Olejnik, K.; Reichlov�, H.; Nov�k, V.; Marti, X.; Gazquez, J.; Saidl, V.; N?mec, P.; Volobuev, V.V.; Springholz, G.; Holy, Vaclav; Jungwirth, T.

Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe Thumbnail


Authors

D. Kriegner

K. V�born�

K. Olejnik

H. Reichlov�

V. Nov�k

X. Marti

J. Gazquez

V. Saidl

P. N?mec

V.V. Volobuev

G. Springholz

Vaclav Holy

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



Abstract

Commercial magnetic memories rely on the bistability of ordered spins in ferromagnetic materials. Recently, experimental bistable memories have been realized using fully compensated antiferromagnetic metals. Here we demonstrate a multiple-stable memory device in epitaxial MnTe, an antiferromagnetic counterpart of common II–VI semiconductors. Favourable micromagnetic characteristics of MnTe allow us to demonstrate a smoothly varying zero-field antiferromagnetic anisotropic magnetoresistance (AMR) with a harmonic angular dependence on the writing magnetic field angle, analogous to ferromagnets. The continuously varying AMR provides means for the electrical read-out of multiple-stable antiferromagnetic memory states, which we set by heat-assisted magneto recording and by changing the writing field direction. The multiple stability in our memory is ascribed to different distributions of domains with the Neel vector aligned along one of the three magnetic easy axes. The robustness against strong magnetic field perturbations combined with the multiple stability of the magnetic memory states are unique properties of antiferromagnets.

Citation

Kriegner, D., Výborný, K., Olejnik, K., Reichlová, H., Novák, V., Marti, X., …Jungwirth, T. (in press). Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe. Nature Communications, 7(11623), https://doi.org/10.1038/ncomms11623

Journal Article Type Article
Acceptance Date Apr 14, 2016
Online Publication Date Jun 9, 2016
Deposit Date Feb 3, 2017
Publicly Available Date Feb 3, 2017
Journal Nature Communications
Electronic ISSN 2041-1723
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 7
Issue 11623
DOI https://doi.org/10.1038/ncomms11623
Public URL https://nottingham-repository.worktribe.com/output/796011
Publisher URL http://www.nature.com/articles/ncomms11623

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