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Field-free control of exchange bias by spin Hall currents

Title
Field-free control of exchange bias by spin Hall currents
Authors
Kim, Hyun-JoongJe, Soong-GeunJung, Dae-HanLee, Ki-SukHong, Jung-Il
DGIST Authors
Kim, Hyun-Joong; Je, Soong-Geun; Jung, Dae-Han; Lee, Ki-Suk; Hong, Jung-Il
Issue Date
2019-07
Citation
Applied Physics Letters, 115(2)
Type
Article
Article Type
Article
Keywords
ELECTRIC CONTROLORBIT TORQUEMAGNETIZATIONTEMPERATURE
ISSN
0003-6951
Abstract
A trilayer structure consisting of ferromagnetic alloy CoFeB/antiferromagnetic IrMn/heavy metal Pt layers was prepared, and the manipulation of its exchange bias effect was achieved without applying an external magnetic field. Spin polarized current, generated by the spin Hall effect of the electrical current through the Pt layer, was shown to be able to control the spin alignment state in the neighboring antiferromagnetic material as well as the corresponding exchange bias effect in the ferromagnet coupled to the antiferromagnet. The results demonstrated stable and reliable switching of the spin structure in antiferromagnets, providing a useful route to all-electrical manipulation of antiferromagnetic states without a need for the bulky global application of the external magnetic field. Therefore, with the results presented in the present work, precise control of magnetism including both ferromagnets and antiferromagnets on submicron to nanometer length scales can be expected. © 2019 Author(s).
URI
http://hdl.handle.net/20.500.11750/10300
DOI
10.1063/1.5109967
Publisher
American Institute of Physics
Related Researcher
  • Author Hong, Jung-Il Spin Nanotech Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
Collection:
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles


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