Next Article in Journal
Domain Patterning in Ion-Sliced LiNbO3 Films by Atomic Force Microscopy
Next Article in Special Issue
Crystal Structures from Powder Diffraction: Principles, Difficulties and Progress
Previous Article in Journal
On the Role of AlN Insertion Layer in Stress Control of GaN on 150-mm Si (111) Substrate
Previous Article in Special Issue
A Diagram of the Structure Evolution of Pb(Zn1/3Nb2/3) O3-9%PbTiO3 Relaxor Ferroelectric Crystals with Excellent Piezoelectric Properties
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Crystals 2017, 7(5), 135; doi:10.3390/cryst7050135

Phase Transition Behavior of the Layered Perovskite CsBi0.6La0.4Nb2O7: A Hybrid Improper Ferroelectric

School of Chemistry and EaStCHEM, University of St Andrews, St Andrews KY16 9ST, UK
Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UK
Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxon OX11 0QX, UK
Author to whom correspondence should be addressed.
Academic Editor: Stevin Snellius Pramana
Received: 20 April 2017 / Revised: 9 May 2017 / Accepted: 10 May 2017 / Published: 13 May 2017
(This article belongs to the Special Issue Crystal Structure of Electroceramics)
View Full-Text   |   Download PDF [2074 KB, uploaded 13 May 2017]   |  


The phase behavior of the layered perovskite CsBi0.6La0.4Nb2O7, of the Dion-Jacobson family, has been studied by high-resolution powder neutron diffraction between the temperatures of 25 < T < 850 °C. At ambient temperature, this material adopts the polar space group P21am; this represents an example of hybrid improper ferroelectricity caused by the interaction of two distinct octahedral tilt modes. Within the limits of our data resolution, the thermal evolution of the crystal structure is consistent with a first-order transition between 700 and 750 °C, with both tilt modes vanishing simultaneously, leading to the aristotype space group P4/mmm. This apparent “avalanche transition” behavior resembles that seen in the related Aurivillius phase SrBi2Nb2O9. View Full-Text
Keywords: polar crystal; layered perovskite; hybrid improper ferroelectric; phase transition polar crystal; layered perovskite; hybrid improper ferroelectric; phase transition

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Dixon, C.A.L.; McNulty, J.A.; Knight, K.S.; Gibbs, A.S.; Lightfoot, P. Phase Transition Behavior of the Layered Perovskite CsBi0.6La0.4Nb2O7: A Hybrid Improper Ferroelectric. Crystals 2017, 7, 135.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top