Broadband control of the viscoelasticity of ferroelectrics via domain switching

We show that the viscoelastic properties of polycrystalline ferroelectric ceramics can be significantly altered over a wide range of mechanical frequencies when domain switching is controlled by cyclic electric fields. The dynamic stiffness of lead zirconate titanate is shown to vary by more than 30...

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Bibliographic Details
Published in:Applied physics letters 2014-10, Vol.105 (16)
Main Authors: Wojnar, C. S., le Graverend, J.-B., Kochmann, D. M.
Format: Article
Language:English
Subjects:
Applied physics
Broadband
Damping
Ferroelectric materials
Ferroelectricity
Lead zirconate titanates
Nonlinear response
Stiffness
Switching
Viscoelasticity
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Summary:We show that the viscoelastic properties of polycrystalline ferroelectric ceramics can be significantly altered over a wide range of mechanical frequencies when domain switching is controlled by cyclic electric fields. The dynamic stiffness of lead zirconate titanate is shown to vary by more than 30%, while damping increases by an order of magnitude. Experimental results are interpreted by the aid of a continuum-mechanics model that captures the nonlinear electro-mechanically coupled material response for the full electric hysteresis.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4899055