Flexoelectric Effect Impact on the Hysteretic Dynamics of the Local Electromechanical Response of Mixed Ionic-Electronic Conductors

A. N. Morozovska; M. D. Glinchuk; O. V. Varenyk; A. Udod; C. M. Scherbakov; S. V. Kalinin

doi:10.15407/ujpe62.04.0328

Flexoelectric Effect Impact on the Hysteretic Dynamics of the Local Electromechanical Response of Mixed Ionic-Electronic Conductors

Authors

A. N. Morozovska Institute of Physics, Nat. Acad. of Sci. of Ukraine, Taras Shevchenko Kiev National University, Physical Faculty, Chair of Theoretical Physics
M. D. Glinchuk I. Frantsevich Institute for Problems of Materials Science, Nat. Acad. of Sci. of Ukraine
O. V. Varenyk Institute of Physics, Nat. Acad. of Sci. of Ukraine
A. Udod I. Frantsevich Institute for Problems of Materials Science, Nat. Acad. of Sci. of Ukraine
C. M. Scherbakov Taras Shevchenko Kiev National University, Physical Faculty, Chair of Theoretical Physics
S. V. Kalinin Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

DOI:

https://doi.org/10.15407/ujpe62.04.0328

Keywords:

flexoelectric effect, mixed ionic-electronic moderate conductors, thin films, nanoparticles, electrochemical strain microscopy

Abstract

Strong coupling among electrochemical potentials, concentrations of electrons, ions, and strains mediated by the flexoelectric effect is a ubiquitous feature of moderate conductors, in particular, MIECs, the materials of choice in devices ranging from electroresistive and memristive elements to ion batteries and fuel cells. Corresponding mechanisms that govern bias-concentration-strain changes (Vegard expansion, deformation potential, and flexoelectric effect) are analyzed. Notably, that the contribution of the flexoelectric coupling to a local surface displacement of the moderate conductors is a complex dynamic effect which may lead to the drastic changing of the material mechanical response, depending on the values of flexoelectric coefficients and other external conditions. Numerical simulations have shown that the flexoelectric impact on the mechanical response ranges from the appearance of additional strain components, essential changes of a hysteresis loop shape and orientation, and the appearance of complex twisted hysteresis loops.

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Published

2018-12-15

How to Cite

Morozovska, A. N., Glinchuk, M. D., Varenyk, O. V., Udod, A., Scherbakov, C. M., & Kalinin, S. V. (2018). Flexoelectric Effect Impact on the Hysteretic Dynamics of the Local Electromechanical Response of Mixed Ionic-Electronic Conductors. Ukrainian Journal of Physics, 62(4), 326. https://doi.org/10.15407/ujpe62.04.0328

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Issue

Vol. 62 No. 4 (2017)

Section

Solid matter

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