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Nanobelt Structure in Perovskite–Spinel Composite Thin Films
Author(s) -
Yan Li,
Bai Feiming,
Li Jiefang,
Viehland D.
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02825.x
Subject(s) - spinel , nucleation , materials science , perovskite (structure) , composite number , nanostructure , phase (matter) , thin film , chemical engineering , nanocrystal , epitaxy , pulsed laser deposition , mineralogy , nanotechnology , composite material , metallurgy , chemistry , layer (electronics) , organic chemistry , engineering
We report a nanobelt structure along the 〈110〉 direction in perovskite–spinel (BiFeO 3 –CoFe 2 O 4 or BFO–CFO) composite epitaxial thin films deposited on SrTiO 3 (STO) substrates by pulsed laser deposition. The results reveal the nucleation and growth mechanism of a nanostructure: first nucleation of perovskite phase regions on STO, followed by segregation of spinel out of the perovskite phase, and finally by evolution of spinel nanobelts that are elongated along the 〈110〉. The reason for control of the nanostructure evolution is a ledge growth mechanism of spinel along the 〈110〉 direction.