Reentrant polar phase induced by the ferroionic coupling in Bi1−𝑥Sm𝑥FeO3 nanoparticles
Journal Article
·
· Physical Review. B
- National Academy of Sciences of Ukraine, Kyiv (Ukraine)
- Taras Shevchenko National University of Kyiv (Ukraine)
- Stockholm Univ. (Sweden); National Technical University of Ukraine, Kyiv (Ukraine)
- Univ. of Tennessee, Knoxville, TN (United States)
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 Bi1−𝑥Sm𝑥FeO3 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 Bi1−𝑥Sm𝑥FeO3 nanoparticles. Calculated phase diagrams are in qualitative agreement with the x-ray diffraction phase analysis, electron paramagnetic resonance, infrared spectroscopy, and electrophysical measurements of Bi1−𝑥Sm𝑥FeO3 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 Bi1−𝑥Sm𝑥FeO3 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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