Preparation and thermoelectric properties of heavily Nb-doped SrO (SrTiO3) 1 epitaxial films

Kyu Hyoung Lee; Akihiro Ishizaki; Sung Wng Kim; Hiromichi Ohta; Kunihito Koumoto

doi:10.1063/1.2764221

Preparation and thermoelectric properties of heavily Nb-doped SrO (SrTiO3) 1 epitaxial films

Kyu Hyoung Lee, Akihiro Ishizaki, Sung Wng Kim, Hiromichi Ohta, Kunihito Koumoto

Department of Materials Science and Engineering

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

21 Citations (Scopus)

Abstract

We report the epitaxial film growth, by pulsed laser deposition, of c -axis-oriented Nb-doped SrO (SrTiO3) 1 films having a K2 NiF4 -type structure and their thermoelectric properties over a wide temperature range, from 20 to 800 K. High-resolution x-ray diffraction and reflection high energy electron diffraction patterns revealed that the films were grown heteroepitaxially on the (001) face of the LaAlO3 substrate. The thermoelectric properties of the Nb-doped SrO (SrTiO3) 1 epitaxial films were improved in terms of power factor compared to those for polycrystalline Nb-doped SrO (SrTiO3) 1. A theoretical analysis of the transport parameters revealed that the intrinsic transport occurred predominantly in the SrTiO3 layers.

Original language	English
Article number	033702
Journal	Journal of Applied Physics
Volume	102
Issue number	3
DOIs	https://doi.org/10.1063/1.2764221
Publication status	Published - 2007

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.2764221

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title = "Preparation and thermoelectric properties of heavily Nb-doped SrO (SrTiO3) 1 epitaxial films",

abstract = "We report the epitaxial film growth, by pulsed laser deposition, of c -axis-oriented Nb-doped SrO (SrTiO3) 1 films having a K2 NiF4 -type structure and their thermoelectric properties over a wide temperature range, from 20 to 800 K. High-resolution x-ray diffraction and reflection high energy electron diffraction patterns revealed that the films were grown heteroepitaxially on the (001) face of the LaAlO3 substrate. The thermoelectric properties of the Nb-doped SrO (SrTiO3) 1 epitaxial films were improved in terms of power factor compared to those for polycrystalline Nb-doped SrO (SrTiO3) 1. A theoretical analysis of the transport parameters revealed that the intrinsic transport occurred predominantly in the SrTiO3 layers.",

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language = "English",

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journal = "Journal of Applied Physics",

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T1 - Preparation and thermoelectric properties of heavily Nb-doped SrO (SrTiO3) 1 epitaxial films

AU - Lee, Kyu Hyoung

AU - Ishizaki, Akihiro

AU - Kim, Sung Wng

AU - Ohta, Hiromichi

AU - Koumoto, Kunihito

PY - 2007

Y1 - 2007

N2 - We report the epitaxial film growth, by pulsed laser deposition, of c -axis-oriented Nb-doped SrO (SrTiO3) 1 films having a K2 NiF4 -type structure and their thermoelectric properties over a wide temperature range, from 20 to 800 K. High-resolution x-ray diffraction and reflection high energy electron diffraction patterns revealed that the films were grown heteroepitaxially on the (001) face of the LaAlO3 substrate. The thermoelectric properties of the Nb-doped SrO (SrTiO3) 1 epitaxial films were improved in terms of power factor compared to those for polycrystalline Nb-doped SrO (SrTiO3) 1. A theoretical analysis of the transport parameters revealed that the intrinsic transport occurred predominantly in the SrTiO3 layers.

AB - We report the epitaxial film growth, by pulsed laser deposition, of c -axis-oriented Nb-doped SrO (SrTiO3) 1 films having a K2 NiF4 -type structure and their thermoelectric properties over a wide temperature range, from 20 to 800 K. High-resolution x-ray diffraction and reflection high energy electron diffraction patterns revealed that the films were grown heteroepitaxially on the (001) face of the LaAlO3 substrate. The thermoelectric properties of the Nb-doped SrO (SrTiO3) 1 epitaxial films were improved in terms of power factor compared to those for polycrystalline Nb-doped SrO (SrTiO3) 1. A theoretical analysis of the transport parameters revealed that the intrinsic transport occurred predominantly in the SrTiO3 layers.

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Preparation and thermoelectric properties of heavily Nb-doped SrO (SrTiO3) 1 epitaxial films

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