Skip to content

Research at St Andrews

Tin titanate – the hunt for a new ferroelectric perovskite

Research output: Contribution to journalReview article

DOI

Open Access Status

  • Embargoed (until 27/08/20)

Author(s)

Jonathan Gardner, Atul Thakre, Ashok Kumar, James F Scott

School/Research organisations

Abstract

We review all the published literature and show that there is no experimental evidence for homogeneous tin titanate SnTiO3 in bulk or thin-film form. Instead a combination of unrelated artefacts are easily misinterpreted. The X-ray Bragg data are contaminated by double scattering from the Si substrate, giving a strong line at the 2-theta angle exactly where perovskite SnTiO3 should appear. The strong dielectric divergence near 560K is irreversible and arises from oxygen site detrapping, accompanied by Warburg/Randles interfacial anomalies. The small (4μC/cm-2) apparent ferroelectric hysteresis remains in samples shown to be pure (Sn,Ti)O2 rutile/cassiterite, in which ferroelectricity is forbidden. Only very recent work reveals real bulk SnTiO3, but it possesses an ilmenite-like structure with an elaborate array of stacking faults, not suitable for ferroelectric devices. Unpublished TEM data reveal an inhomogeneous SnO layered structured thin films, related to shell-core structures. The harsh conclusion is that there
is a combination of unrelated artefacts masquerading as ferroelectricity in powders and ALD films; and only a trace of a second phase in PLD film data suggests any perovskite content at all. The fact that X-ray, dielectric, and hysteresis data all lead to the wrong conclusion is instructive and reminds us of earlier work on copper calcium titanate (a well-known boundary-layer
capacitor).
Close

Details

Original languageEnglish
Article number092501
JournalReports on Progress in Physics
Volume82
Issue number9
DOIs
Publication statusPublished - 27 Aug 2019

    Research areas

  • Ferroelectric, Lead-free, Room-temperature, Tin titanate

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

View graph of relations

Related by journal

  1. Quantum correlations in separable multi-mode states and in classically entangled light

    Korolkova, N. & Leuchs, G., 27 Mar 2019, In : Reports on Progress in Physics. 82, 5, 21 p., 056001.

    Research output: Contribution to journalReview article

  2. Exciton-polariton trapping and potential landscape engineering

    Schneider, C., Winkler, K., Fraser, M. D., Kamp, M., Yamamoto, Y., Ostrovskaya, E. A. & Höfling, S., Jan 2017, In : Reports on Progress in Physics. 80, 1, 22 p., 016503.

    Research output: Contribution to journalReview article

  3. Prospects and applications near ferroelectric quantum phase transitions: a key issues review

    Chandra, P., Lonzarich, G. G., Rowley, S. E. & Scott, J. F., Nov 2017, In : Reports on Progress in Physics. 80, 11, 24 p., 112502.

    Research output: Contribution to journalArticle

  4. The properties of ultrapure delafossite metals

    Mackenzie, A. P., Mar 2017, In : Reports on Progress in Physics. 80, 3, 19 p., 032501.

    Research output: Contribution to journalReview article

ID: 260421286

Top