The varying temperature- and pressure-induced phase transition pathways in hybrid improper ferroelectric Sr<sub>3</sub>Sn<sub>2</sub>O<sub>7</sub>
A variable-temperature and pressure single-crystal diffraction study of hybrid improper ferroelectric Sr<sub>3</sub>Sn<sub>2</sub>O<sub>7</sub> is reported. In combination with symmetry analysis, we reveal that the application of pressure and temperature induce distinct phase transition pathways, driven by a differing response of the octahedral rotations to these stimuli. Contrary to what has been previously predicted, we observe the ferroelectric to paraelectric phase transition between 10.17(18) and 12.13(14) GPa, meaning the hybrid improper ferroelectric phase remains stable to significantly higher pressures than expected.
Authors
- Mark S. Senn (ORCID: https://orcid.org/0000-0003-0812-5281)
- Dominik Daisenberger (ORCID: https://orcid.org/0000-0001-5311-4747)
- Mark R. Warren (ORCID: https://orcid.org/0000-0003-1326-0744)
- Fei‐Ting Huang (ORCID: https://orcid.org/0000-0001-9810-2811)
- J.P. Tidey (ORCID: https://orcid.org/0000-0001-5934-0454)
- Sang-Wook Cheong
- Evie Ladbrook
Institutions
- Diamond Light Source (GB)
- University of Warwick (GB)
Publication Details
- Journal
- Acta Crystallographica Section B Structural Science Crystal Engineering and Materials
- Published
- 2025-04-14
- DOI
- https://doi.org/10.1107/s2052520625002306
- Primary Topic
- Ferroelectric and Piezoelectric Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- Diamond Light Source
- Royal Society
- University of Warwick
- Engineering and Physical Sciences Research Council