Skip to content

Research at St Andrews

Ferroelectric relaxor quantum crystals

Research output: Contribution to journalArticle

DOI

Open Access permissions

Open

Abstract

A discussion is given of ferroelectrics (FEs) that have their Curie temperatures Tc very near absolute zero. These have differences in their dynamics in comparison with higher-temperature systems, since domain wall motion occurs via quantum mechanical tunneling and not by thermally activated diffusion. Emphasis in the present paper is on FEs that have relaxor characteristics. In such systems the temperature at which the isothermal electric susceptibility ε(T,f) peaks is a strong function of frequency, decreasing with decreasing frequency. This is due to glassy viscosity and is symbolic of non-equilibrium dynamics, usually described by a Vogel-Fulcher equation. It permits an extra dimension over which to examine the transitions. The second half of this paper reviews domain wall instabilities and asks about their presence in QCP ferroelectrics, which has not yet been reported and may be unobservable due to the absence of thermal diffusion of walls near T=0; in this respect we note that diffusion does exist in ferroelectric relaxors even at T=0, by virtue of their glassy, viscous dynamics.
Close

Details

Original languageEnglish
Number of pages15
JournalCrystals
Volume8
Issue number4
DOIs
StatePublished - 21 Apr 2018

    Research areas

  • Quantum critical points, Vogel-Fulcher, Relaxor

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Processing and characterization of improved congruent lithium niobate

    Anikiev, A. A., Umarov, M. F. & Scott, J. F. Nov 2018 In : AIP Advances. 8, 11, 8 p., 115016

    Research output: Contribution to journalArticle

  2. Giant polarization in super-tetragonal ferroelectric thin films through interphase strain

    Zhang, L., Chen, J., Fan, L., Diéguez, O., Cao, J., Pan, Z., Wang, Y., Wang, J., Kim, M., Deng, S., Wang, J., Wang, H., Deng, J., Yu, R., Scott, J. F. & Xing, X. 3 Aug 2018 In : Science. 361, 6401, p. 494-497

    Research output: Contribution to journalArticle

  3. Quantum critical points in ferroelectric relaxors: stuffed tungsten bronze K3Li2Ta5O15 and lead pyrochlore (Pb2Nb2O7)

    Smith, R. M., Gardner, J., Morrison, F. D., Rowley, S. E., Ferraz, C., Carpenter, M. A., Chen, J., Hodkinson, J., Dutton, S. E. & Scott, J. F. Aug 2018 In : Physical Review Materials. 2, 8, 13 p., 084409

    Research output: Contribution to journalArticle

  4. Hierarchical domain structure and extremely large wall current in epitaxial BiFeO3 thin films

    Long Bai, Z., Cheng, X., Chen, D. F., Zhang, D. W., Chen, L-Q., Scott, J. F., Hwang, C. S. & Jiang, A. Q. 6 Jun 2018 In : Advanced Functional Materials. Early View, 10 p.

    Research output: Contribution to journalArticle

  5. Ferroelectrics, multiferroics and artifacts: lozenge-shaped hysteresis and things that go bump in the night

    Scott, J. F. & Gardner, J. Jun 2018 In : Materials Today. 21, 5, p. 553-562 10 p.

    Research output: Contribution to journalReview article

Related by journal

  1. Formation mechanism of CaCO3 spherulites in myostracum layer of limpet sahells

    Wu, S., Chiang, C-Y. & Zhou, W. Oct 2017 In : Crystals. 7, 10, 319

    Research output: Contribution to journalArticle

  2. Phase transition behavior of the layered perovskite CsBi0.6La0.4Nb2O7: a hybrid improper ferroelectric

    Dixon, C. A. L., McNulty, J. A., Knight, K. S., Gibbs, A. S. & Lightfoot, P. 13 May 2017 In : Crystals. 7, 5, 11 p., 135

    Research output: Contribution to journalArticle

  3. Reversed crystal growth of calcite in naturally occurring travertine crust

    Greer, H. F., Zhou, W. & Guo, L. 28 Jan 2017 In : Crystals. 7, 2, 36

    Research output: Contribution to journalArticle

  4. Solvent dependent disorder in M2(BzOip)2(H2O)·solvate (M = Co or Zn)

    McCormick, L. J., Morris, S. A., Teat, S. J., Slawin, A. M. Z. & Morris, R. E. 24 Dec 2017 In : Crystals. 8, 1

    Research output: Contribution to journalArticle

ID: 252781697