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Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness
We report on the out-of-plane thermal conductivities of epitaxial Fe(3)O(4) thin films with thicknesses of 100, 300, and 400 nm, prepared using pulsed laser deposition (PLD) on SiO(2)/Si substrates. The four-point probe three-omega (3-ω) method was used for thermal conductivity measurements of the F...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3938477/ https://www.ncbi.nlm.nih.gov/pubmed/24571956 http://dx.doi.org/10.1186/1556-276X-9-96 |
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author | Park, No-Won Lee, Won-Yong Kim, Jin-A Song, Kyungjun Lim, Hyuneui Kim, Wan-Doo Yoon, Soon-Gil Lee, Sang-Kwon |
author_facet | Park, No-Won Lee, Won-Yong Kim, Jin-A Song, Kyungjun Lim, Hyuneui Kim, Wan-Doo Yoon, Soon-Gil Lee, Sang-Kwon |
author_sort | Park, No-Won |
collection | PubMed |
description | We report on the out-of-plane thermal conductivities of epitaxial Fe(3)O(4) thin films with thicknesses of 100, 300, and 400 nm, prepared using pulsed laser deposition (PLD) on SiO(2)/Si substrates. The four-point probe three-omega (3-ω) method was used for thermal conductivity measurements of the Fe(3)O(4) thin films in the temperature range of 20 to 300 K. By measuring the temperature-dependent thermal characteristics of the Fe(3)O(4) thin films, we realized that their thermal conductivities significantly decreased with decreasing grain size and thickness of the films. The out-of-plane thermal conductivities of the Fe(3)O(4) films were found to be in the range of 0.52 to 3.51 W/m · K at 300 K. For 100-nm film, we found that the thermal conductivity was as low as approximately 0.52 W/m · K, which was 1.7 to 11.5 order of magnitude lower than the thermal conductivity of bulk material at 300 K. Furthermore, we calculated the temperature dependence of the thermal conductivity of these Fe(3)O(4) films using a simple theoretical Callaway model for comparison with the experimental data. We found that the Callaway model predictions agree reasonably with the experimental data. We then noticed that the thin film-based oxide materials could be efficient thermoelectric materials to achieve high performance in thermoelectric devices. |
format | Online Article Text |
id | pubmed-3938477 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-39384772014-03-10 Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness Park, No-Won Lee, Won-Yong Kim, Jin-A Song, Kyungjun Lim, Hyuneui Kim, Wan-Doo Yoon, Soon-Gil Lee, Sang-Kwon Nanoscale Res Lett Nano Express We report on the out-of-plane thermal conductivities of epitaxial Fe(3)O(4) thin films with thicknesses of 100, 300, and 400 nm, prepared using pulsed laser deposition (PLD) on SiO(2)/Si substrates. The four-point probe three-omega (3-ω) method was used for thermal conductivity measurements of the Fe(3)O(4) thin films in the temperature range of 20 to 300 K. By measuring the temperature-dependent thermal characteristics of the Fe(3)O(4) thin films, we realized that their thermal conductivities significantly decreased with decreasing grain size and thickness of the films. The out-of-plane thermal conductivities of the Fe(3)O(4) films were found to be in the range of 0.52 to 3.51 W/m · K at 300 K. For 100-nm film, we found that the thermal conductivity was as low as approximately 0.52 W/m · K, which was 1.7 to 11.5 order of magnitude lower than the thermal conductivity of bulk material at 300 K. Furthermore, we calculated the temperature dependence of the thermal conductivity of these Fe(3)O(4) films using a simple theoretical Callaway model for comparison with the experimental data. We found that the Callaway model predictions agree reasonably with the experimental data. We then noticed that the thin film-based oxide materials could be efficient thermoelectric materials to achieve high performance in thermoelectric devices. Springer 2014-02-26 /pmc/articles/PMC3938477/ /pubmed/24571956 http://dx.doi.org/10.1186/1556-276X-9-96 Text en Copyright © 2014 Park et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. |
spellingShingle | Nano Express Park, No-Won Lee, Won-Yong Kim, Jin-A Song, Kyungjun Lim, Hyuneui Kim, Wan-Doo Yoon, Soon-Gil Lee, Sang-Kwon Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
title | Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
title_full | Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
title_fullStr | Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
title_full_unstemmed | Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
title_short | Reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
title_sort | reduced temperature-dependent thermal conductivity of magnetite thin films by controlling film thickness |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3938477/ https://www.ncbi.nlm.nih.gov/pubmed/24571956 http://dx.doi.org/10.1186/1556-276X-9-96 |
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