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@article{Pomiro:2020:10.1103/physrevb.102.014101,
author = {Pomiro, F and Ablitt, C and Bristowe, NC and Mostofi, AA and Won, C and Cheong, S-W and Senn, MS},
doi = {10.1103/physrevb.102.014101},
journal = {Physical Review B},
pages = {014101  1--014101  8},
title = {From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization},
url = {http://dx.doi.org/10.1103/physrevb.102.014101},
volume = {102},
year = {2020}
}

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TY  - JOUR
AB  - Hybrid improper ferroelectrics (HIFs) have been studied intensively over the past few years to gain an understanding of their temperature-induced phase transitions and ferroelectric switching pathways. Here we report a switching from a first- to a second-order phase transition pathway for HIFs Ca3−xSrxTi2O7, which is driven by the differing entropies of the phases that we identify as being associated with the dynamic motion of octahedral tilts and rotations. A greater understanding of the transition pathways in this class of layered perovskites, which host many physical properties that are coupled to specific symmetries and octahedral rotation and tilt distortions—such as superconductivity, negative thermal expansion, fast ion conductivity, ferroelectricity, among others—is a crucial step in creating novel functional materials by design.
AU  - Pomiro,F
AU  - Ablitt,C
AU  - Bristowe,NC
AU  - Mostofi,AA
AU  - Won,C
AU  - Cheong,S-W
AU  - Senn,MS
DO  - 10.1103/physrevb.102.014101
EP  - 1
PY  - 2020///
SN  - 2469-9950
SP  - 014101
TI  - From first- to second-order phase transitions in hybrid improper ferroelectrics through entropy stabilization
T2  - Physical Review B
UR  - http://dx.doi.org/10.1103/physrevb.102.014101
UR  - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.014101
UR  - http://hdl.handle.net/10044/1/80574
VL  - 102
ER  -

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