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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
Author(s)
Kim, Hyun-JoongJung, Min SeungYou, Chun-YeolHong, Jung-Il
Issued Date
2019-06
Citation
Acta Materialia, v.171, pp.170 - 175
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
  • 유천열 You, Chun-Yeol
  • Research Interests Spintronics; Condensed Matter Physics; Magnetic Materials & Thin Films; Micromagnetic Simulations; Spin Nano-Devices
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Appears in Collections:
Department of Physics and Chemistry Spin Nanotech Laboratory 1. Journal Articles
Department of Physics and Chemistry Spin Phenomena for Information Nano-devices(SPIN) Lab 1. Journal Articles

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