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混合非本征铁电体SrSnO₃中由温度和压力变化引起的相变路径

The varying temperature- and pressure-induced phase transition pathways in hybrid improper ferroelectric SrSnO.

作者信息

Ladbrook Evie, Tidey Jeremiah P, Huang Fei Ting, Cheong Sang Wook, Daisenberger Dominik, Warren Mark R, Senn Mark S

机构信息

Department of Chemistry, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, United Kingdom.

Department of Physics, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, United Kingdom.

出版信息

Acta Crystallogr B Struct Sci Cryst Eng Mater. 2025 Jun 1;81(Pt 3):318-324. doi: 10.1107/S2052520625002306. Epub 2025 Apr 14.

DOI:10.1107/S2052520625002306
PMID:40237237
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12147935/
Abstract

A variable-temperature and pressure single-crystal diffraction study of hybrid improper ferroelectric SrSnO 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.

摘要

报道了对混合非本征铁电体SrSnO进行的变温变压单晶衍射研究。结合对称性分析，我们发现压力和温度的施加会引发不同的相变路径，这是由八面体旋转对这些刺激的不同响应所驱动的。与先前预测的情况相反，我们观察到在10.17(18)至12.13(14)吉帕之间发生铁电到顺电的相变，这意味着混合非本征铁电相在比预期高得多的压力下仍保持稳定。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/18b9f952ede6/b-81-00318-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/c118dde5b48a/b-81-00318-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/d69b084d6a9d/b-81-00318-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/2a6d1ee71f28/b-81-00318-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/84a1a54f4a57/b-81-00318-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/d0d14555438b/b-81-00318-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/8f2979956a16/b-81-00318-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/18b9f952ede6/b-81-00318-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/c118dde5b48a/b-81-00318-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/d69b084d6a9d/b-81-00318-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/2a6d1ee71f28/b-81-00318-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/84a1a54f4a57/b-81-00318-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/d0d14555438b/b-81-00318-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/8f2979956a16/b-81-00318-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c706/12147935/18b9f952ede6/b-81-00318-fig7.jpg

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本文引用的文献

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