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
Publication statusPublished - 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. Multifunctional behavior of acceptor-cation substitution at higher doping concentration in PZT ceramics

    Kumari, N., Monga, S., Arif, M., Sharma, N., Sanger, A., Singh, A., Vilarinho, P. M., Gupta, V., Sreenivas, K., Katiyar, R. S. & Scott, J. F., 27 Mar 2019, In : Ceramics International. In press

    Research output: Contribution to journalArticle

  2. Electrical studies of Barkhausen switching noise in ferroelectric PZT: critical exponents and temperature dependence

    Tan, C. D., Flannigan, C., Gardner, J., Morrison, F. D., Salje, E. K. H. & Scott, J. F., 6 Mar 2019, In : Physical Review Materials. 3, 3, 6 p., 034402.

    Research output: Contribution to journalArticle

  3. Studies of multiferroic palladium perovskites

    Pradhan, D. K., Mishra, A. K., Kumari, S., Basu, A., Somayazulu, M., Gradauskaite, E., Smith, R. M., Gardner, J., Turner, P. W., N’Diaye, A. T., Holcomb, M. B., Katiyar, R. S., Zhou, P., Srinivasan, G., Gregg, J. M. & Scott, J. F., 8 Feb 2019, In : Scientific Reports. 9, 12 p., 1685.

    Research output: Contribution to journalArticle

  4. Structural transformations and physical properties of (1 - X) Na0.5Bi0.5TiO3 - X BaTiO3 solid solutions near a morphotropic phase boundary

    Mohanty, H. S., Dam, T., Borkar, H., Pradhan, D. K., Mishra, K. K., Kumar, A., Sahoo, B., Kulriya, P. K., Cazorla, C., Scott, J. F. & Pradhan, D. K., 31 Dec 2018, In : Journal of Physics Condensed Matter. 31, 7, 075401.

    Research output: Contribution to journalArticle

  5. Ferroelectric materials for energy applications

    Huang, H. (ed.) & Scott, J. F. (ed.), Nov 2018, Weinheim: WILEY-VCH Verlag GmbH & Co. KGaA. 384 p.

    Research output: Book/ReportBook

Related by journal

  1. Reversed crystal growth

    Zhou, W., 22 Dec 2018, In : Crystals. 9, 1, 16 p., 7.

    Research output: Contribution to journalReview article

  2. 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

  3. 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

  4. 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

ID: 252781697