Low thermal conductivity of CsBiNb2 O7 epitaxial layers

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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Article number121903
JournalApplied Physics Letters
Volume96
Issue number12
DOIs
StatePublished - Apr 7 2010

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thermal conductivity
low conductivity
oxides
pulsed laser deposition
x ray diffraction
conductivity
transmission electron microscopy
temperature
room temperature
crystals

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Low thermal conductivity of CsBiNb2 O7 epitaxial layers. / Cahill, David G.; Melville, Alexander; Schlom, Darrell G.; Zurbuchen, Mark A.

In: Applied Physics Letters, Vol. 96, No. 12, 121903, 07.04.2010.

Research output: Contribution to journalArticle

Cahill, David G. ; Melville, Alexander ; Schlom, Darrell G. ; Zurbuchen, Mark A. / Low thermal conductivity of CsBiNb2 O7 epitaxial layers. In: Applied Physics Letters. 2010 ; Vol. 96, No. 12.
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