Misorientation control and functionality design of nanopillars in self-assembled perovskite-spinel heteroepitaxial nanostructures

Sheng Chieh Liao, Pei Yu Tsai, Chen Wei Liang, Heng Jui Liu, Jan Chi Yang, Su Jien Lin, Chih Huang Lai, Ying-hao Chu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

In this study, advanced control of crystallographic orientations and magnetic properties of self-assembled nanostructures via rational selections of substrates is demonstrated. We show that in the perovskite-spinel BiFeO 3 -CoFe 2 O 4 model system the crystal orientation of selfassembled CoFe 2 O 4 nanopillars can be tuned among (001), (011), and (111), while that of the BiFeO 3 matrix is fixed in (001). Moreover, the resultant CoFe 2 O 4 nanopillars appear in various shapes: pyramid, roof, and triangular platform, respectively. The tunable nanostructures through this approach enable the control of material functionality such as the magnetic anisotropy of CoFe 2 O 4 . This study opens a new pathway for the engineering of self-assembled heteroepitaxial nanostructures.

Original languageEnglish
Pages (from-to)4118-4122
Number of pages5
JournalACS Nano
Volume5
Issue number5
DOIs
StatePublished - 24 May 2011

Keywords

  • Heteroepitaxial
  • Orientation control
  • Pervoskite
  • Self-assemble
  • Spinel

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