Electric field control of Néel spin–orbit torque in an antiferromagnet
- 8 July 2019
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Materials
- Vol. 18 (9), 931-935
- https://doi.org/10.1038/s41563-019-0424-2
Abstract
Electric field control of spin–orbit torque in ferromagnets1 has been intensively pursued in spintronics to achieve efficient memory and computing devices with ultralow energy consumption. Compared with ferromagnets, antiferromagnets2,3 have huge potential in high-density information storage because of their ultrafast spin dynamics and vanishingly small stray field4,5,6,7. However, the manipulation of spin–orbit torque in antiferromagnets using electric fields remains elusive. Here we use ferroelastic strain from piezoelectric materials to switch the uniaxial magnetic anisotropy in antiferromagnetic Mn2Au films with an electric field of only a few kilovolts per centimetre at room temperature. Owing to the uniaxial magnetic anisotropy, we observe an asymmetric Néel spin–orbit torque8,9 in the Mn2Au, which is used to demonstrate an antiferromagnetic ratchet. The asymmetry of the Néel spin–orbit torque and the corresponding antiferromagnetic ratchet can be reversed by the electric field. Our finding sheds light on antiferromagnet-based memories with ultrahigh density and high energy efficiency.Keywords
This publication has 30 references indexed in Scilit:
- Tunable long-distance spin transport in a crystalline antiferromagnetic iron oxideNature, 2018
- Spin colossal magnetoresistance in an antiferromagnetic insulatorNature Materials, 2018
- Antiferromagnetic spintronicsReviews of Modern Physics, 2018
- Writing and reading antiferromagnetic Mn2Au by Néel spin-orbit torques and large anisotropic magnetoresistanceNature Communications, 2018
- Electric field control of deterministic current-induced magnetization switching in a hybrid ferromagnetic/ferroelectric structureNature Materials, 2017
- Antiferromagnetic spintronicsNature Nanotechnology, 2016
- Electrical switching of an antiferromagnetScience, 2016
- Room-temperature antiferromagnetic memory resistorNature Materials, 2014
- A spin-valve-like magnetoresistance of an antiferromagnet-based tunnel junctionNature Materials, 2011
- Current-driven excitation of magnetic multilayersJournal of Magnetism and Magnetic Materials, 1996