Self-stabilization of the equilibrium state in ferroelectric thin films
نویسندگان
چکیده
(K,Na)NbO3 is a lead-free and sustainable ferroelectric material with electromechanical parameters comparable to Pb(Zr,Ti)O3 (PZT) other lead-based solid solutions. It therefore promising candidate for caloric cooling energy harvesting applications. Specifically, the structural transition from low-temperature Mc- high-temperature c-phase displays rich hierarchical order of domains superdomains, that forms at specific strain conditions. The relevant length scales are few tens nanometers domain micrometers superdomain size, respectively. Phase-field calculations show this adds total free solid. Thus, their formation has strong impact on functional properties electrocaloric or However, monitoring superdomains difficult requires both, high spatial temporal resolution experiment. Synchrotron-based time-resolved X-ray diffraction methods in combination scanning imaging microscopy applied resolve local dynamics morphology sub-micrometer nanosecond resolution. In regime, novel self-stabilization mechanism morphology, which may be general property first-order phase transitions.
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ژورنال
عنوان ژورنال: Applied Surface Science
سال: 2023
ISSN: ['1873-5584', '0169-4332']
DOI: https://doi.org/10.1016/j.apsusc.2022.155891