2020
DOI: 10.1080/00150193.2020.1791657
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Super-high Curie temperature ferroelectrics and superior TC tunability: lattice instability and ferroelectric phase transitions

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Cited by 8 publications
(5 citation statements)
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“…The asymmetry of the crystal structure leads to spontaneous internal polarization in these materials, making them ferroelectric. Importantly, the T c of BLFs is above 800 °C, [ 61 ] which is higher than most other piezoelectric materials, making them promising candidates for high‐temperature piezoelectric applications.…”
Section: D Piezoelectric Materialsmentioning
confidence: 99%
“…The asymmetry of the crystal structure leads to spontaneous internal polarization in these materials, making them ferroelectric. Importantly, the T c of BLFs is above 800 °C, [ 61 ] which is higher than most other piezoelectric materials, making them promising candidates for high‐temperature piezoelectric applications.…”
Section: D Piezoelectric Materialsmentioning
confidence: 99%
“…The high tunability of the Curie temperature from such a high temperature down to −107 °C is possible by the control of the composition of Sr 2 (Nb 1-x Ta x ) 2 O 7 . It is also technologically important [ 58 ].…”
Section: Brillouin Scattering Spectroscopy In Materials Sciencementioning
confidence: 99%
“…Therefore, the crossover from the displacive type to order-disorder one occurs, and it is related to the single minimum potential of Nb ions and double minimum potential of Li ions along the ferroelectric c -axis. In contrast, in Sr 2 Nb 2 O 7 , the soft optic mode was clearly observed at all the temperatures, and it is evidence of the pure displacive type [ 58 ].…”
Section: Brillouin Scattering Spectroscopy In Materials Sciencementioning
confidence: 99%
“…18−21 Among them, the isotope effect plays an important role in hydrogen-bond type ferroelectrics, 21,22 while chemical pressure and strain engineering are mainly limited to inorganic ferroelectrics. 19,20 For the emerging 2D hybrid perovskite ferroelectrics, the ordered−disordered dynamic motions of organic moieties behave as the main driving forces to induce spontaneous polarization, 23,24 which makes the above methods not preferable. Recently, from the viewpoint of chemical design, some new concepts, such as halogen substitution and quasi-spherical theory, have been developed by Xiong et al to modulate the T c of molecular ferroelectrics.…”
mentioning
confidence: 99%
“…In the early history of ferroelectric research, substantial feasible strategies, such as isotope effect, chemical pressure, strain engineering, etc., have been employed to modulate T c effectively. Among them, the isotope effect plays an important role in hydrogen-bond type ferroelectrics, , while chemical pressure and strain engineering are mainly limited to inorganic ferroelectrics. , For the emerging 2D hybrid perovskite ferroelectrics, the ordered–disordered dynamic motions of organic moieties behave as the main driving forces to induce spontaneous polarization, , which makes the above methods not preferable. Recently, from the viewpoint of chemical design, some new concepts, such as halogen substitution and quasi-spherical theory, have been developed by Xiong et al to modulate the T c of molecular ferroelectrics. Especially, halogen substitution has been proved to be an effective strategy for obtaining high-temperature hybrid perovskite ferroelectrics, which stems from the increase in the potential energy barrier by the precise molecular modification of hydrogen atoms with halogens.…”
mentioning
confidence: 99%