Epitaxial growth and capacitance-voltage characteristics of BiFeO 3/CeO 2/yttria-stabilized zirconia/Si(001) heterostructure

  • Zhongqiang Hu
  • , Meiya Li
  • , Yongdan Zhu
  • , Shizhou Pu
  • , Xiaolian Liu
  • , Bobby Sebo
  • , Xingzhong Zhao
  • , Shuxiang Dong

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We report the epitaxial growth of multiferroic BiFeO 3 (BFO) film on Si(001) substrate by pulsed laser deposition using CeO 2/yttria- stabilized zirconia (YSZ) as buffer layers. The epitaxial relationships of the films were BFO(001)/CeO 2(001)/YSZ(001)/Si(001) for out-of-plane and [110]BFO∥[100]CeO 2∥[100]YSZ∥[100]Si for in-plane, respectively. Capacitance-voltage characteristics of a Pt/BFO/CeO 2/YSZ/p-Si capacitor exhibited clockwise hysteresis loops with a large memory window of 2.5 V at sweeping voltages of ±16 V. Both the high and low capacitance values showed no obvious degradation after 10 4 s. The improved retention property was attributed to the use of high-k CeO 2/YSZ insulating layers that effectively eliminated the charge trapping in the heterostructure.

Original languageEnglish
Article number252908
JournalApplied Physics Letters
Volume100
Issue number25
DOIs
StatePublished - 18 Jun 2012
Externally publishedYes

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