Ferroelectric domain states of a tetragonal BiFeO3 thin film investigated by second harmonic generation microscopy

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We investigate the ferroelectric state of a tetragonal BiFeO3 thin film grown on a LaAlO3 (001) substrate using an optical second harmonic generation (SHG) microscope. Whereas the ferroelectric state of this material hosts nanometer-sized domains which again form micrometer-sized domains of four different configurations, we could figure out the characteristic features of each domain from the SHG mapping with various sizes of the probe beam, i.e., from 0.7 to 3.9 mu m in its diameter. In particular, we demonstrate that a single micrometer-sized domain contributes to the SHG as a coherent summation of the constituent nanometer-sized domains, and multi-micrometer-sized domains contribute to the SHG as an incoherent summation of each micro-domain.
Publisher
SPRINGER
Issue Date
2017-05
Language
English
Article Type
Article
Keywords

ROOM-TEMPERATURE; STRAIN

Citation

NANOSCALE RESEARCH LETTERS, v.12, pp.353

ISSN
1556-276X
DOI
10.1186/s11671-017-2126-5
URI
http://hdl.handle.net/10203/224099
Appears in Collection
PH-Journal Papers(저널논문)
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