Improvement of ferroelectric fatigue endurance in multiferroic (Ba0.5Sr0.5)TiO3/(Bi1.05La0.05)FeO3/(Ba0.5Sr0.5)TiO3 sandwich structures

J. Miao, B.P. Zhang, Khian-Hooi Chew, Y. Wang

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    25 Citations (Scopus)


    We report the improved ferroelectric properties in dielectric/multiferroic/dielectric sandwich structures composed of Ba0.5Sr0.5TiO3 (BST) and Bi1.05La0.05FeO3 (BLF). Compared with the single BLF film, the trilayer structures exhibit a lower dielectric loss and weaker frequency dependence of dielectric properties. At room temperature, the remnant polarization and saturation polarization of the trilayer structures are 34.3 and 46.9 μC/cm2, respectively. More interestingly, the polarization of BST/BLF/BST trilayer exhibits a fatigue-free characteristic of up to 109 switching cycles. Applying Dawber’s model, the concentration of oxygen vacancies and barrier energy of oxygen vacancies migration in BST/BLF/BST trilayer are calculated as 6.1×1017 cm-3 and 1.33 eV, respectively.
    Original languageEnglish
    Pages (from-to)ARTN 062902
    JournalApplied Physics Letters
    Issue number6
    Publication statusPublished - 2008


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