Low thermal conductivity of CsBiNb2 O7 epitaxial layers

David G. Cahill; Alexander Melville; Darrell G. Schlom; Mark A. Zurbuchen

doi:10.1063/1.3368120

Low thermal conductivity of CsBiNb₂ O⁷ epitaxial layers

David G. Cahill, Alexander Melville, Darrell G. Schlom, Mark A. Zurbuchen

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

Abstract

The thermal conductivity of an epitaxial layer of CsBiNb₂ O ⁷ grown by pulsed-laser deposition is measured by time-domain thermoreflectance in the temperature range 100<T<600 K. Characterization by x-ray diffraction and cross-sectional transmission electron microscopy show that the sample has the n=2 structure of the Dion-Jacobson series of phases. The conductivity of this layered oxide is ≈60% of the predicted minimum thermal conductivity in this temperature range; the thermal conductivity at room temperature, 0.4 W m-1 K-1, is comparable to the lowest conductivity ever observed in an oxide crystal.

Original language	English (US)
Article number	121903
Journal	Applied Physics Letters
Volume	96
Issue number	12
DOIs	https://doi.org/10.1063/1.3368120
State	Published - 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Online availability

10.1063/1.3368120

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Cite this

@article{e85c06eb38544caaa8c7d83f2bbd8d98,

title = "Low thermal conductivity of CsBiNb2 O7 epitaxial layers",

abstract = "The thermal conductivity of an epitaxial layer of CsBiNb2 O 7 grown by pulsed-laser deposition is measured by time-domain thermoreflectance in the temperature range 100<T<600 K. Characterization by x-ray diffraction and cross-sectional transmission electron microscopy show that the sample has the n=2 structure of the Dion-Jacobson series of phases. The conductivity of this layered oxide is ≈60% of the predicted minimum thermal conductivity in this temperature range; the thermal conductivity at room temperature, 0.4 W m-1 K-1, is comparable to the lowest conductivity ever observed in an oxide crystal.",

author = "Cahill, {David G.} and Alexander Melville and Schlom, {Darrell G.} and Zurbuchen, {Mark A.}",

note = "Funding Information: This research was supported by DARPA and the U.S. Department of Energy Grant No. DE-FG02-07ER46459. Experiments were carried out in the Laser and Spectroscopy Laboratory of the Materials Research Laboratory at the University of Illinois, which is partially supported by the U.S. Department of Energy under Grant No. DE-FG02-07ER46453. We thank A. Chernatynskiy and S. Phillpot for sharing their results with us prior to publication.",

year = "2010",

doi = "10.1063/1.3368120",

language = "English (US)",

volume = "96",

journal = "Applied Physics Letters",

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AU - Cahill, David G.

AU - Melville, Alexander

AU - Schlom, Darrell G.

AU - Zurbuchen, Mark A.

N1 - Funding Information: This research was supported by DARPA and the U.S. Department of Energy Grant No. DE-FG02-07ER46459. Experiments were carried out in the Laser and Spectroscopy Laboratory of the Materials Research Laboratory at the University of Illinois, which is partially supported by the U.S. Department of Energy under Grant No. DE-FG02-07ER46453. We thank A. Chernatynskiy and S. Phillpot for sharing their results with us prior to publication.

PY - 2010

Y1 - 2010

N2 - The thermal conductivity of an epitaxial layer of CsBiNb2 O 7 grown by pulsed-laser deposition is measured by time-domain thermoreflectance in the temperature range 100<T<600 K. Characterization by x-ray diffraction and cross-sectional transmission electron microscopy show that the sample has the n=2 structure of the Dion-Jacobson series of phases. The conductivity of this layered oxide is ≈60% of the predicted minimum thermal conductivity in this temperature range; the thermal conductivity at room temperature, 0.4 W m-1 K-1, is comparable to the lowest conductivity ever observed in an oxide crystal.

AB - The thermal conductivity of an epitaxial layer of CsBiNb2 O 7 grown by pulsed-laser deposition is measured by time-domain thermoreflectance in the temperature range 100<T<600 K. Characterization by x-ray diffraction and cross-sectional transmission electron microscopy show that the sample has the n=2 structure of the Dion-Jacobson series of phases. The conductivity of this layered oxide is ≈60% of the predicted minimum thermal conductivity in this temperature range; the thermal conductivity at room temperature, 0.4 W m-1 K-1, is comparable to the lowest conductivity ever observed in an oxide crystal.

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