Self-assembled perovskite-spinel heterostructure on a highly distorted substrate

Y. M. Zhu*, D. Ke, R. Yu, Y. H. Hsieh, H. J. Liu, P. P. Liu, Ying-hao Chu, Q. Zhan

*Corresponding author for this work

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Abstract

The pattern configuration and interface structure in epitaxial BiFeO 3 -CoFe 2 O 4 heterostructures grown on (010) pc NdGaO 3 substrates have been investigated systematically by transmission electron microscopy and chemical analysis. The crystal orientation of CoFe 2 O 4 variants was tuned to [111] CFO , while BiFeO 3 kept [010] pc matching the substrate. Triangular prism-shaped CoFe 2 O 4 embedded in the BiFeO 3 matrix grew as an equilibrium island mode with {111} CFO as its surfaces and interfaces. Two types of BiFeO 3 -CoFe 2 O 4 orientation relationships were determined as (001)[010] BFO //(0-22)[111] CFO and (101)[010] BFO //(-220)[111] CFO . The results reveal that the dominant factors controlling the growth orientation of the present vertical heterostructures are surface energy anisotropy and atomic structure continuity.

Original languageEnglish
Article number111903
JournalApplied Physics Letters
Volume102
Issue number11
DOIs
StatePublished - 18 Mar 2013

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    Zhu, Y. M., Ke, D., Yu, R., Hsieh, Y. H., Liu, H. J., Liu, P. P., Chu, Y., & Zhan, Q. (2013). Self-assembled perovskite-spinel heterostructure on a highly distorted substrate. Applied Physics Letters, 102(11), [111903]. https://doi.org/10.1063/1.4796037