Jungwirth, T. and Kaspar, Z. and Surynek, M. and Zubac, J. and Krizek, F. and Novak, V and Campion, R. P. and Woernle, M. S. and Gambardella, P. and Marti, X. and Nemec, P. and Edmonds, K. W. and Reimers, S. and Amin, O. J. and Maccherozzi, F. and Dhesi, S. S. and Wadley, P. and Wunderlich, J. and Olejnik, K. (2021) Quenching of an antiferromagnet into high resistivity states using electrical or ultrashort optical pulses. NATURE ELECTRONICS, 4 (1). pp. 30-37. ISSN 2520-1131,
Full text not available from this repository. (Request a copy)Abstract
Electrical and short optical pulses can be used to deterministically induce and reverse a nano-fragmented domain state in antiferromagnetic CuMnAs, in a process that can be probed via changes in the resistance of the system. 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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MEMORY; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 May 2021 15:55 |
| Last Modified: | 17 May 2021 15:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43322 |
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