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Title: Glass-Like Thermal Conductivity of (010)-Textured Lanthanum-Doped Strontium Niobate Synthesized with Wet Chemical Deposition

Abstract

We have measured the cross-plane thermal conductivity (κ) of (010)-textured, undoped, and lanthanum-doped strontium niobate (Sr 2-xLa xNb 2O 7-δ) thin films via time-domain thermoreflectance. Then the thin films were deposited on (001)-oriented SrTiO 3 substrates via the highly-scalable technique of chemical solution deposition. We find that both film thickness and lanthanum doping have little effect on κ, suggesting that there is a more dominant phonon scattering mechanism present in the system; namely the weak interlayer-bonding along the b-axis in the Sr 2Nb 2O 7 parent structure. We also compare our experimental results with two variations of the minimum-limit model for κ and discuss the nature of transport in material systems with weakly-bonded layers. The low cross-plane κ of these scalably-fabricated films is comparable to that of similarly layered niobate structures grown epitaxially.

Authors:
 [1];  [2];  [2];  [3];  [2];  [2];  [1]
  1. Univ. of Virginia, Charlottesville, VA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1111302
Report Number(s):
SAND-2013-7932J
Journal ID: ISSN 0002-7820; 474313
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 98; Journal Issue: 2; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Foley, Brian M., Brown-Shaklee, Harlan J., Campion, Michael J., Medlin, Douglas L., Clem, Paul G., Ihlefeld, Jon F., and Hopkins, Patrick E. Glass-Like Thermal Conductivity of (010)-Textured Lanthanum-Doped Strontium Niobate Synthesized with Wet Chemical Deposition. United States: N. p., 2014. Web. doi:10.1111/jace.13318.
Foley, Brian M., Brown-Shaklee, Harlan J., Campion, Michael J., Medlin, Douglas L., Clem, Paul G., Ihlefeld, Jon F., & Hopkins, Patrick E. Glass-Like Thermal Conductivity of (010)-Textured Lanthanum-Doped Strontium Niobate Synthesized with Wet Chemical Deposition. United States. doi:10.1111/jace.13318.
Foley, Brian M., Brown-Shaklee, Harlan J., Campion, Michael J., Medlin, Douglas L., Clem, Paul G., Ihlefeld, Jon F., and Hopkins, Patrick E. Sat . "Glass-Like Thermal Conductivity of (010)-Textured Lanthanum-Doped Strontium Niobate Synthesized with Wet Chemical Deposition". United States. doi:10.1111/jace.13318. https://www.osti.gov/servlets/purl/1111302.
@article{osti_1111302,
title = {Glass-Like Thermal Conductivity of (010)-Textured Lanthanum-Doped Strontium Niobate Synthesized with Wet Chemical Deposition},
author = {Foley, Brian M. and Brown-Shaklee, Harlan J. and Campion, Michael J. and Medlin, Douglas L. and Clem, Paul G. and Ihlefeld, Jon F. and Hopkins, Patrick E.},
abstractNote = {We have measured the cross-plane thermal conductivity (κ) of (010)-textured, undoped, and lanthanum-doped strontium niobate (Sr2-xLaxNb2O7-δ) thin films via time-domain thermoreflectance. Then the thin films were deposited on (001)-oriented SrTiO3 substrates via the highly-scalable technique of chemical solution deposition. We find that both film thickness and lanthanum doping have little effect on κ, suggesting that there is a more dominant phonon scattering mechanism present in the system; namely the weak interlayer-bonding along the b-axis in the Sr2Nb2O7 parent structure. We also compare our experimental results with two variations of the minimum-limit model for κ and discuss the nature of transport in material systems with weakly-bonded layers. The low cross-plane κ of these scalably-fabricated films is comparable to that of similarly layered niobate structures grown epitaxially.},
doi = {10.1111/jace.13318},
journal = {Journal of the American Ceramic Society},
issn = {0002-7820},
number = 2,
volume = 98,
place = {United States},
year = {2014},
month = {11}
}

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