Thermal conductivity reduction in oxygen-deficient strontium titanates

Choongho Yu; Matthew L. Scullin; Mark Huijben; Ramamoorthy Ramesh; Arun Majumdar

doi:10.1063/1.2930679

Thermal conductivity reduction in oxygen-deficient strontium titanates

Choongho Yu, Matthew L. Scullin, Mark Huijben, Ramamoorthy Ramesh, Arun Majumdar

University of Twente

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Abstract

We report significant thermal conductivity reduction in oxygen-deficient lanthanum-doped strontium titanate (Sr1−xLaxTiO3−δ) films as compared to unreduced strontium titanates. Our experimental results suggest that the oxygen vacancies could have played an important role in the reduction. This could be due to the nature of randomly distributed and clustered vacancies, which would be very effective to scatter phonons. Our results could provide a pathway for tailoring the thermal conductivity of complex oxides, which is very beneficial to various applications including thermoelectrics

Original language	English
Pages (from-to)	191911
Number of pages	3
Journal	Applied physics letters
Volume	92
Issue number	19
DOIs	https://doi.org/10.1063/1.2930679
Publication status	Published - 2008

Keywords

IR-75215

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10.1063/1.2930679

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title = "Thermal conductivity reduction in oxygen-deficient strontium titanates",

abstract = "We report significant thermal conductivity reduction in oxygen-deficient lanthanum-doped strontium titanate (Sr1−xLaxTiO3−δ) films as compared to unreduced strontium titanates. Our experimental results suggest that the oxygen vacancies could have played an important role in the reduction. This could be due to the nature of randomly distributed and clustered vacancies, which would be very effective to scatter phonons. Our results could provide a pathway for tailoring the thermal conductivity of complex oxides, which is very beneficial to various applications including thermoelectrics",

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AU - Yu, Choongho

AU - Scullin, Matthew L.

AU - Huijben, Mark

AU - Ramesh, Ramamoorthy

AU - Majumdar, Arun

PY - 2008

Y1 - 2008

N2 - We report significant thermal conductivity reduction in oxygen-deficient lanthanum-doped strontium titanate (Sr1−xLaxTiO3−δ) films as compared to unreduced strontium titanates. Our experimental results suggest that the oxygen vacancies could have played an important role in the reduction. This could be due to the nature of randomly distributed and clustered vacancies, which would be very effective to scatter phonons. Our results could provide a pathway for tailoring the thermal conductivity of complex oxides, which is very beneficial to various applications including thermoelectrics

AB - We report significant thermal conductivity reduction in oxygen-deficient lanthanum-doped strontium titanate (Sr1−xLaxTiO3−δ) films as compared to unreduced strontium titanates. Our experimental results suggest that the oxygen vacancies could have played an important role in the reduction. This could be due to the nature of randomly distributed and clustered vacancies, which would be very effective to scatter phonons. Our results could provide a pathway for tailoring the thermal conductivity of complex oxides, which is very beneficial to various applications including thermoelectrics

KW - IR-75215

U2 - 10.1063/1.2930679

DO - 10.1063/1.2930679

M3 - Article

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VL - 92

SP - 191911

JO - Applied physics letters

JF - Applied physics letters

IS - 19

ER -

Thermal conductivity reduction in oxygen-deficient strontium titanates

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