First-principles study of the lattice strain effects on the ionic migration barrier of sm-doped ceria

Musa Alaydrus, Mamoru Sakaue, Susan M. Aspera, Triati D.K. Wungu, Tran P.T. Linh, Hideaki Kasai, Tatsumi Ishihara

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Recent experiments on thin films and hetero-structures of ionically conducting oxides have indicated to an enhancement of oxygen ion conduction typically ascribed to strain-related effects. We performed first-principles calculations to investigate the effects of biaxial lattice strain on the oxygen anion diffusivity in Sm2O3 doped CeO2 (SDC). The oxygen ion migration paths and barriers in SDC as functions of lattice strain were assessed computationally using density functional theory (DFT) with U correction and climbing image nudged elastic band (CI-NEB) method. Our current results indicate that both expansive and compressive strains lead to decreases in the ionic migration barriers.

    Original languageEnglish
    Pages (from-to)2733-2739
    Number of pages7
    JournalECS Transactions
    Volume57
    Issue number1
    DOIs
    Publication statusPublished - 2013

    All Science Journal Classification (ASJC) codes

    • Engineering(all)

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