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Park, Kyoung-Duck
Nano-PhotoEnergy Lab.
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Ultrafast Anisotropic Optical Response and Coherent Acoustic Phonon Generation in Polycrystalline BaTiO3-BiFeO3

Author(s)
Magill, Brenden A.Park, Kyoung-DuckZhou, YuanChorpa, AnujMaurya, DeepamPriya, ShashankRaschke, MarkusBelyanim, AlexeyStanton, Christopher J.Khodaparast, Giti A.
Issued Date
2016-08
DOI
10.1515/ehs-2015-0028
URI
https://scholarworks.unist.ac.kr/handle/201301/25122
Fulltext
https://www.degruyter.com/view/j/ehs.2016.3.issue-3/ehs-2015-0028/ehs-2015-0028.xml
Citation
ENERGY HARVESTING AND SYSTEMS, v.3, no.3, pp.229 - 236
Abstract
We optically study the as-yet little explored multiferroic material, BaTiO3-BiFeO3 (BTO-BFO), that has demonstrated enhanced magnetic properties, a higher DC resistance in comparison to BFO, and improved magnetoelectric coupling. Our studies include: ultrafast time resolved differential reflection, optically induced birefringence, and second-harmonic nano-imaging of the ferroic order. We observe a strong sensitivity to pump/probe polarizations, photo-induced ferroelectric poling on a picosecond timescale, as well as the generation of photo-induced coherent acoustic phonons with a frequency of ∼11 GHz. The second-harmonic generation nano-imaging reveals disordered but distinct ferroelectric domain order, percolating even across grain boundaries in the poly-crystalline thin film.
Publisher
DE GRUYTER
ISSN
2329-8766

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