The origin of antiferroelectricity in PbZrO3
Alexander K. Tagantsev,Kaushik Vaideeswaran,Sergey Vakhrushev,Alexey Filimonov,R. G. Burkovsky,R. G. Burkovsky,A. P. Shaganov,Daria Andronikova,A. I. Rudskoy,Alfred Q. R. Baron,Hiroshi Uchiyama,Dmitry Chernyshov,Alexei Bosak,Z. Ujma,Krystian Roleder,Andrzej Majchrowski,Jae-Hyeon Ko,Nava Setter +17 more
TLDR
This work reports the results of a study on the lattice dynamics of the antiferroelectric lead zirconate using inelastic and diffuse X-ray scattering techniques and the Brillouin light scattering, and suggests an approach to the treatment of complex phase transitions in ferroics.Abstract:
Antiferroelectrics are essential ingredients for the widely applied piezoelectric and ferroelectric materials: the most common ferroelectric, lead zirconate titanate is an alloy of the ferroelectric lead titanate and the antiferroelectric lead zirconate. Antiferroelectrics themselves are useful in large digital displacement transducers and energy-storage capacitors. Despite their technological importance, the reason why materials become antiferroelectric has remained allusive since their first discovery. Here we report the results of a study on the lattice dynamics of the antiferroelectric lead zirconate using inelastic and diffuse X-ray scattering techniques and the Brillouin light scattering. The analysis of the results reveals that the antiferroelectric state is a 'missed' incommensurate phase, and that the paraelectric to antiferroelectric phase transition is driven by the softening of a single lattice mode via flexoelectric coupling. These findings resolve the mystery of the origin of antiferroelectricity in lead zirconate and suggest an approach to the treatment of complex phase transitions in ferroics.read more
Citations
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Flexoelectricity in solids: Progress, challenges, and perspectives
TL;DR: The flexoelectricity describes the contribution of the linear couplings between the electric polarization and strain gradient and between polarization gradient and strain to the thermodynamics of a solid as discussed by the authors.
Journal ArticleDOI
Giant Electric Energy Density in Epitaxial Lead‐Free Thin Films with Coexistence of Ferroelectrics and Antiferroelectrics
Biaolin Peng,Biaolin Peng,Qi Zhang,Qi Zhang,Xing Li,Tieyu Sun,Huiqing Fan,Shanming Ke,Mao Ye,Yu Wang,Wei Lu,Hanben Niu,James F. Scott,Xierong Zeng,Haitao Huang +14 more
TL;DR: In this paper, a pulsed laser deposited (Bi1/2Na 1/2)0.9118La0.02Ba0.0582(Ti0.97Zr0.03)O3 (BNLBTZ) epitaxial lead-free relaxor thin films with the coexistence of ferroelectric and antiferroelectric (AFE) phases are presented.
Journal ArticleDOI
Jagged-Delta asymmetry in Notch signaling can give rise to a Sender/Receiver hybrid phenotype.
Marcelo Boareto,Marcelo Boareto,Mohit Kumar Jolly,Mingyang Lu,José N. Onuchic,Cecilia Clementi,Eshel Ben-Jacob,Eshel Ben-Jacob +7 more
TL;DR: It is found that the asymmetry between the modulations of Delta and Jagged leads to the existence of the previously unexplored possibility of a Sender–Receiver phenotype enabling two interacting cells to share a similar fate.
Journal ArticleDOI
Quantification of flexoelectricity in PbTiO3/SrTiO3 superlattice polar vortices using machine learning and phase-field modeling.
Qian Li,Christopher T. Nelson,Shang-Lin Hsu,Anoop R. Damodaran,Li Li,Ajay K. Yadav,Martin D. McCarter,Lane W. Martin,Lane W. Martin,Ramamoorthy Ramesh,Sergei V. Kalinin +10 more
TL;DR: The presence of flexoelectricity in the recently discovered polar vortices in Pb TiO3/SrTiO3 superlattices is shown based on a combination of machine-learning analysis of the atomic-scale electron microscopy imaging data and phenomenological phase-field modeling.
Journal ArticleDOI
Ferroelectric translational antiphase boundaries in nonpolar materials.
Xian-Kui Wei,Alexander K. Tagantsev,Alexander Kvasov,Krystian Roleder,Chun-Lin Jia,Nava Setter +5 more
TL;DR: It is shown first that antiphase boundaries in antiferroelectrics may possess ferroelectricity, then identified and evidence their polarity by electron microscopy using negative spherical-aberration imaging technique and ab initio modelling confirms the polar bi-stable nature of the walls.
References
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