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Reentrant polar phase induced by the ferroionic coupling in B⁢i1−𝑥⁢S⁢m𝑥⁢Fe⁢O3 nanoparticles

Journal Article · · Physical Review. B
Using the model of four sublattices, the Landau-Ginzburg-Devonshire-Kittel phenomenological approach and the Stephenson-Highland ionic adsorption model for the description of coupled polar and antipolar long-range orders in ferroics, we analytically calculated the phase diagrams and polar properties of B⁢i1−𝑥⁢S⁢m𝑥⁢Fe⁢O3 nanoparticles covered by surface ions with dependence on their size, surface ions density, samarium content 𝑥 , and temperature. The size effects and ferroionic coupling govern the appearance and stability conditions of the long-range ordered ferroelectric, reentrant ferrielectric, and antiferroelectric phases in B⁢i1−𝑥⁢S⁢m𝑥⁢Fe⁢O3 nanoparticles. Calculated phase diagrams are in qualitative agreement with the x-ray diffraction phase analysis, electron paramagnetic resonance, infrared spectroscopy, and electrophysical measurements of B⁢i1−𝑥⁢S⁢m𝑥⁢Fe⁢O3 nanopowders sintered by the solution combustion method. The combined theoretical-experimental approach allows us to explain the influence of the ferroionic coupling and size effects in B⁢i1−𝑥⁢S⁢m𝑥⁢Fe⁢O3 nanoparticles on their polar properties.
Research Organization:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Organization:
National Research Foundation of Ukraine; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0021118
OSTI ID:
2483741
Alternate ID(s):
OSTI ID: 3003207
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 22 Vol. 110; ISSN 2469-9950; ISSN 2469-9969
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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