Electrically induced and detected Néel vector reversal in a collinear antiferromagnet.

Autor:	Godinho J; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic. godinho@fzu.cz.; Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 12116, Prague 2, Czech Republic. godinho@fzu.cz., Reichlová H; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic.; Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062, Dresden, Germany., Kriegner D; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic.; Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany., Novák V; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic., Olejník K; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic., Kašpar Z; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic., Šobáň Z; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic., Wadley P; School of Physics and Astronomy, University Of Nottingham, NG7 2RD, Nottingham, United Kingdom., Campion RP; School of Physics and Astronomy, University Of Nottingham, NG7 2RD, Nottingham, United Kingdom., Otxoa RM; Hitachi Cambridge Laboratory, Hitachi Europe LTD, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom.; Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia-San Sebastian, 20018, Spain., Roy PE; Hitachi Cambridge Laboratory, Hitachi Europe LTD, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom., Železný J; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic., Jungwirth T; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic.; School of Physics and Astronomy, University Of Nottingham, NG7 2RD, Nottingham, United Kingdom., Wunderlich J; Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 160 00, Prague 6, Czech Republic. jw526@cam.ac.uk.; Hitachi Cambridge Laboratory, Hitachi Europe LTD, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom. jw526@cam.ac.uk.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2018 Nov 08; Vol. 9 (1), pp. 4686. Date of Electronic Publication: 2018 Nov 08.
DOI:	10.1038/s41467-018-07092-2
Abstrakt:	Antiferromagnets are enriching spintronics research by many favorable properties that include insensitivity to magnetic fields, neuromorphic memory characteristics, and ultra-fast spin dynamics. Designing memory devices with electrical writing and reading is one of the central topics of antiferromagnetic spintronics. So far, such a combined functionality has been demonstrated via 90° reorientations of the Néel vector generated by the current-induced spin orbit torque and sensed by the linear-response anisotropic magnetoresistance. Here we show that in the same antiferromagnetic CuMnAs films as used in these earlier experiments we can also control 180° Néel vector reversals by switching the polarity of the writing current. Moreover, the two stable states with opposite Néel vector orientations in this collinear antiferromagnet can be electrically distinguished by measuring a second-order magnetoresistance effect. We discuss the general magnetic point group symmetries allowing for this electrical readout effect and its specific microscopic origin in CuMnAs.
Databáze:	MEDLINE
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