The structure of a new nano-phase of lanthanum-doped strontium titanate

Ercin C. Duran; Alexander S. Eggeman

doi:10.1016/j.jssc.2020.121795

The structure of a new nano-phase of lanthanum-doped strontium titanate

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Abstract

A novel ordered phase in La-doped SrTiO3 was determined through three-dimensional electron diffraction studies. An overall stoichiometry of LaSr7Ti8O23 leads to a monoclinic structure with layers of square pyramids of TiO5 localised near the lanthanum substituted positions. The difference in crystal structure of the nanoprecipitates, particularly the connection of the rigid Ti–O frameworks, should affect the phonon interactions in the bulk material and so helps to explain a decrease in the lattice thermal conductivity in the La-doped SrTiO3, which is beneficial towards desired thermoelectric properties.

Original language	English
Pages (from-to)	121795
Journal	Journal of Solid State Chemistry
Early online date	15 Oct 2020
DOIs	https://doi.org/10.1016/j.jssc.2020.121795
Publication status	E-pub ahead of print - 15 Oct 2020

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10.1016/j.jssc.2020.121795

https://linkinghub.elsevier.com/retrieve/pii/S0022459620306265

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title = "The structure of a new nano-phase of lanthanum-doped strontium titanate",

abstract = "A novel ordered phase in La-doped SrTiO3 was determined through three-dimensional electron diffraction studies. An overall stoichiometry of LaSr7Ti8O23 leads to a monoclinic structure with layers of square pyramids of TiO5 localised near the lanthanum substituted positions. The difference in crystal structure of the nanoprecipitates, particularly the connection of the rigid Ti–O frameworks, should affect the phonon interactions in the bulk material and so helps to explain a decrease in the lattice thermal conductivity in the La-doped SrTiO3, which is beneficial towards desired thermoelectric properties.",

author = "Duran, {Ercin C.} and Eggeman, {Alexander S.}",

year = "2020",

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T1 - The structure of a new nano-phase of lanthanum-doped strontium titanate

AU - Duran, Ercin C.

AU - Eggeman, Alexander S.

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Y1 - 2020/10/15

N2 - A novel ordered phase in La-doped SrTiO3 was determined through three-dimensional electron diffraction studies. An overall stoichiometry of LaSr7Ti8O23 leads to a monoclinic structure with layers of square pyramids of TiO5 localised near the lanthanum substituted positions. The difference in crystal structure of the nanoprecipitates, particularly the connection of the rigid Ti–O frameworks, should affect the phonon interactions in the bulk material and so helps to explain a decrease in the lattice thermal conductivity in the La-doped SrTiO3, which is beneficial towards desired thermoelectric properties.

AB - A novel ordered phase in La-doped SrTiO3 was determined through three-dimensional electron diffraction studies. An overall stoichiometry of LaSr7Ti8O23 leads to a monoclinic structure with layers of square pyramids of TiO5 localised near the lanthanum substituted positions. The difference in crystal structure of the nanoprecipitates, particularly the connection of the rigid Ti–O frameworks, should affect the phonon interactions in the bulk material and so helps to explain a decrease in the lattice thermal conductivity in the La-doped SrTiO3, which is beneficial towards desired thermoelectric properties.

U2 - 10.1016/j.jssc.2020.121795

DO - 10.1016/j.jssc.2020.121795

M3 - Article

SN - 0022-4596

SP - 121795

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

ER -

The structure of a new nano-phase of lanthanum-doped strontium titanate

Abstract

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