|
authors |
Xu, WJ; Romanyuk, K; Zeng, Y; Ushakov, A; Shur, V; Tselev, A; Zhang, WX; Chen, XM; Kholkin, A; Rocha, J |
|
nationality |
International |
|
journal |
JOURNAL OF MATERIALS CHEMISTRY C |
|
keywords |
ROOM-TEMPERATURE FERROELECTRICITY; ORGANIC-INORGANIC HYBRID; THERMAL-EXPANSION; PEROVSKITE-LIKE; SOLID-SOLUTION; CRYSTALS; PIEZOELECTRICITY; POLARIZATION; SERIES |
|
abstract |
The recent emergence of multiaxial molecular ferroelectrics opens up a new route toward technological evolution in the next-generation flexible/wearable device applications. However, a fundamental understanding of multiaxial ferroelectricity and polarization switching at the microscopic level in these materials is still missing. Herein, we study a high-temperature multiaxial perovskite ferroelectric (Me3NOH)(2)[KCo(CN)(6)] (TMC-4) that exhibits a bond-switching phase transition at 417 K with notable piezoelectricity and spontaneous polarization in the ferroelectric phase. The cleavage and reformation of coordination bonds and hydrogen bonds during the bond-switching transition all contribute to a large entropy change of 178.79 J K-1 kg(-1) at the phase transition. Using piezoresponse force microscopy (PFM), we observed diverse ferroelectric domain structures and provide evidence for both 180 degrees and non-180 degrees domain switching and their possible effect on the functional properties of molecular ferroelectrics. The results provide an insight into the multiaxial ferroelectricity of TMC-4 at the microscopic level enabling its further use in device applications. |
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publisher |
ROYAL SOC CHEMISTRY |
|
issn |
2050-7526 |
|
isbn |
2050-7534 |
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year published |
2021 |
|
volume |
9 |
|
issue |
33 |
|
beginning page |
10741 |
|
ending page |
10748 |
|
digital object identifier (doi) |
10.1039/d1tc01261d |
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web of science category |
8 |
|
subject category |
Materials Science, Multidisciplinary; Physics, Applied |
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unique article identifier |
WOS:000649428500001
|
