Ultrafast Anisotropic Optical Response and Coherent Acoustic Phonon Generation in Polycrystalline BaTiO3-BiFeO3-Reference-Cited by-同舟云学术

Ultrafast Anisotropic Optical Response and Coherent Acoustic Phonon Generation in Polycrystalline BaTiO3-BiFeO3

Published:2016-04-16 Issue:3 Volume:3 Page:229-236
ISSN:2329-8774
Container-title:Energy Harvesting and Systems
language:en
Short-container-title:

Author:

Magill Brenden A.¹,Park Kyoung-Duck²,Zhou Yuan³,Chopra Anuj³,Maurya Deepam³,Priya Shashank³,Raschke Markus²,Belyanin Alexey⁴,Stanton Christopher J.⁵,Khodaparast Giti A.¹

Affiliation:

1. Department of Physics, Virginia Tech., Blacksburg, VA, USA

2. Department of Physics, Department of Chemistry, and JILA, University of Colorado Boulder, Boulder, CO, USA

3. Department of Mechanical Engineering, Virgina Tech., Blacksburg, VA, USA

4. Department of Physics & Astronomy, Texas A&M University, College Station, TX, USA

5. Department of Physics, University of Florida, Gainesville, FL, USA

Abstract

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

$ \sim 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

Walter de Gruyter GmbH

Subject

Electrochemistry,Electrical and Electronic Engineering,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment

Link

https://www.degruyter.com/document/doi/10.1515/ehs-2015-0028/pdf

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1. Coherent acoustic phonons and ultrafast carrier dynamics in hetero-epitaxial BaTiO3–BiFeO3 films and nanorods;Journal of Materials Chemistry C;2019