期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 803, 期 -, 页码 1136-1140出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.06.145
关键词
Multiferroics; Diffraction; Crystal structure; Phase transitions
资金
- RSF [18-19-00307]
- FCT [UID/FIS/04564/2016]
- Russian Science Foundation [18-19-00307] Funding Source: Russian Science Foundation
Crystal structure of the Bi(1-x)Ba(x)Fo(1-x)Ti(x)O(3) ceramics across the phase boundary region between the polar rhombohedral and pseudo-cubic phases has been investigated by means of X-ray and neutron diffraction, scanning electron microscopy and differential scanning calorimetry techniques. The structural measurements have revealed a decrease in the rhombohedral distortions upon increase in the dopant content followed by the stabilization of the pseudo-cubic phase at x >= 0.20. While temperature increase gives rise to the similar pattern of structural changes for the lightly-doped samples, an unpredictable temperature-driven strengthening of the rhombohedral distortions has been found for the compounds belonging to the phase boundary region. The study specifies the peculiarities of the temperature-driven evolution of the crystal structure depending on the structural state of the compounds at room temperature. (C) 2019 Elsevier B.V. All rights reserved.
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