Temperature dependence of field-response mechanisms in 0.4Ba(Zr0.2Ti0.8)O3–0.6(Ba0.7Ca0.3)TiO3

Autor:	Chris M. Fancher, Özgür Keleṣ, Matthias C. Ehmke, Keith J. Bowman
Rok vydání:	2021
Předmět:	Diffraction Phase boundary Materials science Physics and Astronomy (miscellaneous) Field (physics) Condensed matter physics Electric field Energy landscape Polarization (waves) Ferroelectricity Flattening
Zdroj:	Applied Physics Letters. 119:022904
ISSN:	1077-3118 0003-6951
DOI:	10.1063/5.0056110
Popis:	Understanding the temperature dependence of how ferroelectric materials respond to electric fields is critical for determining how best to use these materials in applications. Here, temperature dependent in situ x-ray diffraction is used to study how field-response mechanism Ba ( Zr 0.2 Ti 0.8 ) O 3– x ( Ba 0.7 Ca 0.3 ) TiO 3 evolves with temperature. Increasing the measurement temperature was found to slightly reduce the extent of domain reversal and the magnitude of the 111 lattice strain. Instead, these results indicate that temperature predominantly impacted the angular dependence of the 002/200 lattice strain. We attribute the observed differences in 002/200 lattice strain to the flattening of the free-energy near the tetragonal-orthorhombic phase boundary, where the flattening of the energy landscape promotes a polarization rotation response during the application of electric fields at room temperature.
Databáze:	OpenAIRE
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