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Controllable magnetic anisotropy of ferromagnet/antiferromagnet bilayers coupled with piezoelectric strain

Title
Controllable magnetic anisotropy of ferromagnet/antiferromagnet bilayers coupled with piezoelectric strain
Authors
Kim, Hyun-JoongJung, Min SeungYou, Chun-YeolHong, Jung-Il
DGIST Authors
Kim, Hyun-Joong; Jung, Min Seung; You, Chun-YeolHong, Jung-Il
Issue Date
2019-06
Citation
Acta Materialia, 171, 170-175
Type
Article
Article Type
Article
Author Keywords
Magneto-electric couplingPiezoelectric strainsMagnetic anisotropyCritical angle
Keywords
EXCHANGE BIASRESONANCEENERGY
ISSN
1359-6454
Abstract
Coupling of magnetoelastic and piezoelectric effects is achieved with the ferromagnetic (FM) Co60Fe20B20/antiferromagnetic (AFM) Co0.7Ni0.3O bilayers deposited on the surface of piezoelectric single crystalline substrate. Piezoelectric strain of the substrate is successfully transferred to the magnetic layers, and controllable variation of magnetic anisotropy in response to the elastic deformation is demonstrated in the M-H loops measured at various azimuthal angles with respect to the direction of AFM spin alignment. Magnetic behaviors of the exchange coupled bilayers can be understood by considering the competition of many magnetic anisotropy energies within the magnetic film based on the modified Meiklejohn and Bean (MB) model. From the comparison of experimentally measured results with the modified MB model, it is found that the strain in the film from the substrate effectively introduces additional uniaxial anisotropy in the FM layer with its anisotropy direction and magnitude determined by the applied strain. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/9994
DOI
10.1016/j.actamat.2019.04.015
Publisher
Elsevier BV
Related Researcher
  • Author Hong, Jung-Il Spin Nanotech Laboratory
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceSpin Phenomena for Information Nano-devices(SPIN) Lab1. Journal Articles
Department of Emerging Materials ScienceSpin Nanotech Laboratory1. Journal Articles


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