Journal
NANOMATERIALS
Volume 10, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/nano10040801
Keywords
multiferroics; diffraction; crystal structure; phase transitions
Categories
Funding
- RSF [18-19-00307]
- Fundacao para a Ciencia e a Tecnologia [UID/04564/2020]
- Russian academic excellence project 5-100 for Sechenov University
- national funds through the FCT/MEC [UIDB/50011/2020, UIDP/50011/2020]
- Russian Science Foundation [18-19-00307] Funding Source: Russian Science Foundation
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Evolution of the crystal structure of ceramics BiFeO3-BaTiO3 across the morphotropic phase boundary was analyzed using the results of macroscopic measuring techniques such as X-ray diffraction, differential scanning calorimetry, and differential thermal analysis, as well as the data obtained by local scale methods of scanning probe microscopy. The obtained results allowed to specify the concentration and temperature regions of the single phase and phase coexistent regions as well as to clarify a modification of the structural parameters across the rhombohedral-cubic phase boundary. The structural data show unexpected strengthening of structural distortion specific for the rhombohedral phase, which occurs upon dopant concentration and temperature-driven phase transitions to the cubic phase. The obtained results point to the non-monotonous character of the phase evolution, which is specific for metastable phases. The compounds with metastable structural state are characterized by enhanced sensitivity to external stimuli, which significantly expands the perspectives of their particular use.
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