Infrared spectroscopy of CaTiO3, SrTiO3, BaTiO 3, Ba0.5Sr0.5TiO3 thin films, and (BaTiO3)5/(SrTiO3)5 superlattice grown on SrRuO3/SrTiO3(001) substrates

S. S.A. Seo; H. N. Lee; T. W. Noh

doi:10.1016/j.tsf.2004.10.061

Infrared spectroscopy of CaTiO₃, SrTiO₃, BaTiO ₃, Ba_0.5Sr_0.5TiO₃ thin films, and (BaTiO₃)₅/(SrTiO₃)₅ superlattice grown on SrRuO₃/SrTiO₃(001) substrates

S. S.A. Seo, H. N. Lee, T. W. Noh

Materials Science and Technology Div

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

We investigated infrared-active phonons of CaTiO₃, SrTiO ₃, BaTiO₃, and Ba_0.5Sr_0.5TiO ₃ thin films, and a (BaTiO₃)₅/(SrTiO ₃)₅ artificial superlattice by a Fourier transform infrared spectrometer with a grazing angle (48°) incident reflectance method. The longitudinal phonon energies of the thin films were different from those of the bulk material due to the lattice strain of the substrate. The Ba_0.5Sr_0.5TiO₃ thin film and (BaTiO ₃)₅/(SrTiO₃)₅ superlattice showed different phonon modes due to structural discrepancies, even though their chemical compositions are similar. The Ba_0.5Sr_0.5TiO ₃ thin film showed a single phonon energy lying between the phonon energies of BaTiO₃ and SrTiO₃ thin films, while the (BaTiO₃)₅/(SrTiO₃)₅ superlattice well preserved the characteristic phonon modes of BaTiO₃ and SrTiO₃ thin films.

Original language	English
Pages (from-to)	94-97
Number of pages	4
Journal	Thin Solid Films
Volume	486
Issue number	1-2
DOIs	https://doi.org/10.1016/j.tsf.2004.10.061
State	Published - Aug 22 2005

Funding

This work is supported by the Ministry of Science and Technology through the Creative Research Initiative program in Korea, and one of the authors (HNL) acknowledges support from the U.S. Department of Energy under Contract No. DE-AC05-00OR22725 with the Oak Ridge National Laboratory, managed by UT-Battelle, LLC, as part of a BES NSET initiative on Nanoscale Cooperative Phenomena and of the LDRD Program.

Funders	Funder number
BES NSET
U.S. Department of Energy	DE-AC05-00OR22725
Oak Ridge National Laboratory
Laboratory Directed Research and Development
Ministerio de Ciencia y Tecnología

Keywords

Dielectrics
Infrared spectroscopy
Superlattices
Titanium oxide

Access to Document

10.1016/j.tsf.2004.10.061

Cite this

@article{ba72f040e3454e83b33ca5f097973906,

title = "Infrared spectroscopy of CaTiO3, SrTiO3, BaTiO 3, Ba0.5Sr0.5TiO3 thin films, and (BaTiO3)5/(SrTiO3)5 superlattice grown on SrRuO3/SrTiO3(001) substrates",

abstract = "We investigated infrared-active phonons of CaTiO3, SrTiO 3, BaTiO3, and Ba0.5Sr0.5TiO 3 thin films, and a (BaTiO3)5/(SrTiO 3)5 artificial superlattice by a Fourier transform infrared spectrometer with a grazing angle (48°) incident reflectance method. The longitudinal phonon energies of the thin films were different from those of the bulk material due to the lattice strain of the substrate. The Ba0.5Sr0.5TiO3 thin film and (BaTiO 3)5/(SrTiO3)5 superlattice showed different phonon modes due to structural discrepancies, even though their chemical compositions are similar. The Ba0.5Sr0.5TiO 3 thin film showed a single phonon energy lying between the phonon energies of BaTiO3 and SrTiO3 thin films, while the (BaTiO3)5/(SrTiO3)5 superlattice well preserved the characteristic phonon modes of BaTiO3 and SrTiO3 thin films.",

keywords = "Dielectrics, Infrared spectroscopy, Superlattices, Titanium oxide",

author = "Seo, {S. S.A.} and Lee, {H. N.} and Noh, {T. W.}",

year = "2005",

month = aug,

day = "22",

doi = "10.1016/j.tsf.2004.10.061",

language = "English",

volume = "486",

pages = "94--97",

journal = "Thin Solid Films",

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T1 - Infrared spectroscopy of CaTiO3, SrTiO3, BaTiO 3, Ba0.5Sr0.5TiO3 thin films, and (BaTiO3)5/(SrTiO3)5 superlattice grown on SrRuO3/SrTiO3(001) substrates

AU - Seo, S. S.A.

AU - Lee, H. N.

AU - Noh, T. W.

PY - 2005/8/22

Y1 - 2005/8/22

N2 - We investigated infrared-active phonons of CaTiO3, SrTiO 3, BaTiO3, and Ba0.5Sr0.5TiO 3 thin films, and a (BaTiO3)5/(SrTiO 3)5 artificial superlattice by a Fourier transform infrared spectrometer with a grazing angle (48°) incident reflectance method. The longitudinal phonon energies of the thin films were different from those of the bulk material due to the lattice strain of the substrate. The Ba0.5Sr0.5TiO3 thin film and (BaTiO 3)5/(SrTiO3)5 superlattice showed different phonon modes due to structural discrepancies, even though their chemical compositions are similar. The Ba0.5Sr0.5TiO 3 thin film showed a single phonon energy lying between the phonon energies of BaTiO3 and SrTiO3 thin films, while the (BaTiO3)5/(SrTiO3)5 superlattice well preserved the characteristic phonon modes of BaTiO3 and SrTiO3 thin films.

AB - We investigated infrared-active phonons of CaTiO3, SrTiO 3, BaTiO3, and Ba0.5Sr0.5TiO 3 thin films, and a (BaTiO3)5/(SrTiO 3)5 artificial superlattice by a Fourier transform infrared spectrometer with a grazing angle (48°) incident reflectance method. The longitudinal phonon energies of the thin films were different from those of the bulk material due to the lattice strain of the substrate. The Ba0.5Sr0.5TiO3 thin film and (BaTiO 3)5/(SrTiO3)5 superlattice showed different phonon modes due to structural discrepancies, even though their chemical compositions are similar. The Ba0.5Sr0.5TiO 3 thin film showed a single phonon energy lying between the phonon energies of BaTiO3 and SrTiO3 thin films, while the (BaTiO3)5/(SrTiO3)5 superlattice well preserved the characteristic phonon modes of BaTiO3 and SrTiO3 thin films.

KW - Dielectrics

KW - Infrared spectroscopy

KW - Superlattices

KW - Titanium oxide

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