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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Electric-field-induced strain mechanisms in lead-free 94%(Bi1/2Na1/2)TiO3-6%BaTiO3

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Title
Electric-field-induced strain mechanisms in lead-free 94%(Bi1/2Na1/2)TiO3-6%BaTiO3
Author
Simons, HughDaniels, JohnJo, WookDittmer, RobertStuder, AndrewAvdeev, MaximRoedel, JuergenHoffman, Mark
Keywords
Cubic phasis; Electric-field-induced strain; Field directions; High resolution; Higher-degree; Lead-Free; Macroscopic strains; Preferred orientations; Remanent strain; Rhombohedral distortion; Structural distortions; Structural effect; Structural origin; TiO; Virgin materials
Issue Date
2011-02
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.98, no.8, pp. -
Abstract
High resolution neutron diffraction has been used to investigate the structural origin of the large electric-field-induced remanent strain in 94(Bi1/2Na1/2)TiO3-6BaTiO(3) ceramics. The virgin material was found to be a mixture of near-cubic phases with slight tetragonal and rhombohedral distortions of a(0)a(0)c(+) and a(-)a(-)a(-) octahedral tilt type, respectively. Application of an electric field of 4.57 kV/mm transformed the sample to a predominantly rhombohedral a(-)a(-)a(-) modification with a significantly higher degree of structural distortion and a pronounced preferred orientation of the c-axis along the field direction. These electric field-induced structural effects contribute significantly to the macroscopic strain and polarization of this system.
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DOI
10.1063/1.3557049
ISSN
0003-6951
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MSE_Journal Papers
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