Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses

0544558 - FZÚ 2022 RIV DE eng J - Článek v odborném periodiku
Kašpar, Zdeněk - Surýnek, M. - Zubáč, Jan - Křížek, Filip - Novák, Vít - Campion, R. P. - Woernle, M.S. - Gambardella, P. - Martí, Xavier - Němec, P. - Edmonds, K. W. - Reimers, S. - Amin, O. J. - Maccherozzi, F. - Dhesi, S.S. - Wadley, P. - Wunderlich, Joerg - Olejník, Kamil - Jungwirth, Tomáš
Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses.
Nature Electronics. Roč. 4, č. 1 (2021), s. 30-37. ISSN 2520-1131. E-ISSN 2520-1131
Grant CEP: GA MŠMT LM2018110; GA MŠMT(CZ) LM2018096; GA ČR(CZ) GX19-28375X
GRANT EU: European Commission(XE) 766566 - ASPIN
Institucionální podpora: RVO:68378271
Klíčová slova: antiferromagnets * spintronic devices * antiferromagnetic CuMnAs
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 33.255, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1038/s41928-020-00506-4

Antiferromagnets are of potential use in the development of spintronic devices due to their ultrafast dynamics, insensitivity to external magnetic fields and absence of magnetic stray fields. Similar to their ferromagnetic counterparts, antiferromagnets can store information in the orientations of the collective magnetic order vector. However, the readout magnetoresistivity signals in simple antiferromagnetic films are weak, and reorientation of the magnetic order vector via optical excitation has not yet been achieved. Here we report the reversible and reproducible quenching of antiferromagnetic CuMnAs into nano-fragmented domain states using either electrical or ultrashort optical pulses. The changes in the resistivity of the system approach 20% at room temperature, which is comparable to the giant magnetoresistance ratios in ferromagnetic multilayers. We also obtain a signal readout by optical reflectivity.
Trvalý link: http://hdl.handle.net/11104/0321420