Interfacial phenomena in dielectric-ferroelectric composites have significant potential for promoting novel properties. Here, we utilize a dynamic Landau–Ginzburg–Devonshire methodology to elucidate the influence of an electrostatic self-interaction on the polarization behavior of spherical ferroelectric nanoparticles embedded in a dielectric matrix. By varying the particle volume and the dielectric permittivity of the surrounding medium, phase boundaries between states with polarization patterns exhibiting monodomains, structural, and electrical polydomains, and vortex-like topologies are observed in isolated particles. Under an applied bias, incomplete screening of surface charges leads to a size-dependent, monodomain-to-vortex topological phase transition that suppresses macroscopic polarization. The vortex topology observed in the polarization-suppressed region of the hysteresis originates from the minimization of surface charges at the particle-matrix interface, resulting in linear behavior and double hysteresis loops.
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Surface charge mediated polar response in ferroelectric nanoparticles
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27 December 2021
Research Article|
December 27 2021
Surface charge mediated polar response in ferroelectric nanoparticles
Kevin Co;
Kevin Co
1
Department of Materials Science and Engineering and Institute of Materials Science, University of Connecticut
, Storrs, Connecticut 06269, USA
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S. Pamir Alpay
;
S. Pamir Alpay
1
Department of Materials Science and Engineering and Institute of Materials Science, University of Connecticut
, Storrs, Connecticut 06269, USA
2
Department of Physics, University of Connecticut
, Storrs, Connecticut 06269, USA
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Serge Nakhmanson
;
Serge Nakhmanson
1
Department of Materials Science and Engineering and Institute of Materials Science, University of Connecticut
, Storrs, Connecticut 06269, USA
2
Department of Physics, University of Connecticut
, Storrs, Connecticut 06269, USA
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John Mangeri
John Mangeri
a)
3
Materials Research and Technology Department, Luxembourg Institute of Science and Technology, Esch-sur-Alzette
4362, Luxembourg
a)Author to whom correspondence should be addressed: john.mangeri@list.lu
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a)Author to whom correspondence should be addressed: john.mangeri@list.lu
Appl. Phys. Lett. 119, 262903 (2021)
Article history
Received:
November 04 2021
Accepted:
December 04 2021
Citation
Kevin Co, S. Pamir Alpay, Serge Nakhmanson, John Mangeri; Surface charge mediated polar response in ferroelectric nanoparticles. Appl. Phys. Lett. 27 December 2021; 119 (26): 262903. https://doi.org/10.1063/5.0077629
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