Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4769448
Keywords
-
Categories
Funding
- National Science Foundation [CBET 1134311]
- Laboratory Directed Research and Development (LDRD) program at Sandia National Laboratories
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1134311] Funding Source: National Science Foundation
Ask authors/readers for more resources
We measure the thermal conductivities of nano-grained strontium titanate (ng-SrTiO3) films deposited on sapphire substrates via time-domain thermoreflectance. The 170 nm thick oxide films of varying grain-size were prepared from a chemical solution deposition process. We find that the thermal conductivity of ng-SrTiO3 decreases with decreasing average grain size and attribute this to increased phonon scattering at grain boundaries. Our data are well described by a model that accounts for the spectral nature of anharmonic Umklapp scattering along with grain boundary scattering and scattering due to the film thickness. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769448]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available