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Improvement of ferroelectric fatigue endurance in multiferroic (Ba(0.5)Sr(0.5))TiO(3)/(Bi(1.05)La(0.05))FeO(3)/(Ba(0.5)Sr(0.5))TiO(3) sandwich structures
Applied Physics Letters (2008)
  • Chew Khian Hooi, University of Malaya
  • Miao J.
  • Zhang B. P.
  • Wang Y.
Abstract

We report the improved ferroelectric properties in dielectric/multiferroic/dielectric sandwich structures composed of Ba(0.5)Sr(0.5)TiO(3) (BST) and Bi(1.05)La(0.05)FeO(3) (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 mu C/cm(2), respectively. More interestingly, the polarization of BST/BLF/BST trilayer exhibits a fatigue-free characteristic of up to 10(9) 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 6.1x10(17) cm(-3) and 1.33 eV, respectively. (C) 2008 American Institute of Physics.

Keywords
  • thin-films,
  • temperature,
  • capacitors
Disciplines
Publication Date
2008
Citation Information
Chew Khian Hooi, Miao J., Zhang B. P. and Wang Y.. "Improvement of ferroelectric fatigue endurance in multiferroic (Ba(0.5)Sr(0.5))TiO(3)/(Bi(1.05)La(0.05))FeO(3)/(Ba(0.5)Sr(0.5))TiO(3) sandwich structures" Applied Physics Letters Vol. 92 Iss. 6 (2008)
Available at: http://works.bepress.com/chew_khianhooi/4/