The search for efficient approaches to realize local switching of magnetic moments in spintronic devices has attracted extensive attention. One of the most promising approaches is the electrical manipulation of magnetization through electron-mediated spin torque. However, the Joule heat generated via electron motion unavoidably causes substantial energy dissipation and potential damage to spintronic devices. Here, all-oxide heterostructures of SrRuO3 /NiO/SrIrO3 were epitaxially grown on SrTiO3 single-crystal substrates following the order of the ferromagnetic transition metal oxide SrRuO3 with perpendicular magnetic anisotropy, insulating and antiferromagnetic NiO, and metallic transition metal oxide SrIrO3 with strong spin-orbit coupling. We demonstrate that instead of the electron spin torques, the magnon torques present in the antiferromagnetic NiO layer could directly manipulate the perpendicular magnetization of the ferromagnetic layer. This magnon mechanism may significantly reduce the electron motion-related energy dissipation from electron-mediated spin currents. Interestingly, the threshold current density to generate a sufficient magnon current to manipulate the magnetization was one order of magnitude smaller than that in conventional metallic systems. These findings suggest a route for developing highly efficient all-oxide spintronic devices operated by magnon current. This article is protected by copyright. All rights reserved.
Bibliographical noteKAUST Repository Item: Exported on 2022-10-31
Acknowledged KAUST grant number(s): OSR-2017-CRG6-3427, OSR-2019-CRG8-4081
Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology, Office of Sponsored Research (OSR), under award No. OSR-2017-CRG6-3427 and OSR-2019-CRG8-4081. D.X.Z. acknowledges financial support from the National Natural Science Foundation of China (11704278) and the Natural Science Foundation of Tianjin City (19JCQNJC03000). Z.Q.Q acknowledges financial support of US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05-CH11231 (van der Waals heterostructures program, KCWF16). K.L. acknowledges support from the US NSF (DMR-2005108).
ASJC Scopus subject areas
- Mechanics of Materials
- Materials Science(all)
- Mechanical Engineering