Electric-field-induced AFE-FE transitions and associated strain/preferred orientation in antiferroelectric PLZST

Teng Lu, Andrew J. Studer, Lasse Noren, Wanbiao Hu, Dehong Yu, Bethany McBride, Yujun Feng, Ray L. Withers, Hua Chen, Zhuo Xu, Yun Liu*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)

    Abstract

    Electric-field-induced, antiferroelectric-ferroelectric (AFE-FE) phase transitions are common for AFE materials. To date, the strain and preferred orientation evolution as well as the role of the intermediate FE state during the successive AFE-FE-AFE phase transitions has not been clear. To this end, we have herein studied a typical AFE Pb0.97La0.02(Zr0.56Sn0.33Ti0.11)O3 (PLZST) material using in-situ neutron diffraction. It is striking that the AFE-FE phase transition is not fully reversible: in the electric-field-induced FE state, the induced strain exhibits an elliptical distribution, which in turn leads to significant preferred orientation in the final AFE state after withdrawal of the applied electric-field. The ω-dependent neutron diffraction patterns show clear evidence of the induced strain distribution and associated preferred orientation arising from the AFE-FE phase transition. The current work also provides an explanation for several temperature and electric-field dependent dielectric anomalies as well as unrecovered strain change which appear in AFE materials after exposure to sufficiently high electric fields.

    Original languageEnglish
    Article number23659
    JournalScientific Reports
    Volume6
    DOIs
    Publication statusPublished - 30 Mar 2016

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