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Synthesis and characterization of (111)-oriented BaTiO3 thin films

Bolstad, Torstein; Kjærnes, Kristoffer; Raa, Kristoffer S.; Takahashi, Ryota; Lippmaa, Mikk; Tybell, Per Thomas Martin
Journal article, Peer reviewed
Accepted version
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URI
http://hdl.handle.net/11250/2590260
Date
2019
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  • Institutt for elektroniske systemer [1532]
  • Publikasjoner fra CRIStin - NTNU [19849]
Original version
Materials Research Express. 2019, 6 056409-?.   https://doi.org/10.1088/2053-1591/ab0221
Abstract
The synthesis of (111)-oriented BaTiO3 thin films on Nb-doped SrTiO3 and bilayers of BaTiO3 and La0.7Sr0.3MnO3 on SrTiO3 are investigated. With increasing thickness the films are found to exhibit a decreasing out-of-plane lattice parameter and increased surface roughness. The BaTiO3 films on doped SrTiO3 are found to be relaxed with indications of increasing defect density with increasing thickness. Through piezoresponse force microscopy, pyroelectric measurements, and tunneling electroresistance measurements, indications of ferroelectric behavior are found in (111)-oriented BaTiO3 down to a thickness of 5 nm.
Publisher
IOP Publishing
Journal
Materials Research Express

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