Antiferroelectrics: History, fundamentals, crystal chemistry, crystal structures, size effects, and applications

By Clive A. Randall, Z. Fan, I. Reaney, Long-qing Chen, Susan E. Trolier-McKinstry. 2021

179 citations recorded by the source corpus.

Antiferroelectric (AFE) materials have identifiable spontaneously ordered dipole moments that are arranged antiparallel so as to cancel out on a unitcell basis at zero field, but for which an electric field of sufficient magnitude can induce a phase transition to a ferroelectric (FE) phase with parallel dipole ordering, as illustrated in Figure 1A. The AFE phase is typically a consequence of a structural phase transition from a higher temperature phase known as the prototype and/or paraelectric (PE) phase.1– 23 It takes place through either a displacive softmode transition or an order– disorder process that involves the ordering of preexisting dipoles that were disordered in the hightemperature PE phase. The phase transition between PEAFE occurs at a critical temperature, Tc. On the application of an electric field of sufficient strength, the material can switch from the lowtemperature AFE phase to a FE phase with a polar space group (Figure 1A).4,5 In a phenomenological description, a phase transition is typically described by an order parameter or a set of order parameters.6 In the case of the AFE, there are two sublattices with the same magnitude of spontaneous polarization but in opposite directions, leaving a netzero macroscopic Received: 26 January 2021 | Revised: 19 March 2021 | Accepted: 22 March 2021 DOI: 10.1111/jace.17834

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/86f6b33faae4203d2bcdba66bb7092b42f958b5a