Karpinsky Dmitry V, Silibin Maxim V, Trukhanov Sergei V, Trukhanov Alex V, Zhaludkevich Alexander L, Latushka Siarhei I, Zhaludkevich Dmitry V, Khomchenko Vladimir A, Alikin Denis O, Abramov Alexander S, Maniecki Tomasz, Maniukiewicz Waldemar, Wolff Martin, Heitmann Volker, Kholkin Andrei L
Institute of Advanced Materials and Technologies, National Research University of Electronic Technology "MIET", 124498 Moscow, Russia.
Laboratory of Technology and Physics of Crystals Growth, Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus.
Nanomaterials (Basel). 2020 Apr 21;10(4):801. doi: 10.3390/nano10040801.
Evolution of the crystal structure of ceramics BiFeO-BaTiO 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.
利用X射线衍射、差示扫描量热法和差热分析等宏观测量技术的结果，以及扫描探针显微镜局部尺度方法获得的数据，分析了陶瓷BiFeO-BaTiO在同型相界处的晶体结构演变。所得结果能够确定单相和相共存区域的浓度和温度范围，并阐明沿菱方-立方相界结构参数的变化。结构数据表明，在掺杂剂浓度和温度驱动向立方相转变时，菱方相特有的结构畸变意外增强。所得结果表明相演变具有非单调特性，这是亚稳相所特有的。具有亚稳结构状态的化合物对外界刺激具有更高的敏感性，这显著拓展了其特殊用途的前景。
