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Title: Thermal and transport properties of U3Si2

Abstract

Here, we have studied U3Si2 by means of the heat capacity, electrical resistivity, Seebeck and Hall effects, and thermal conductivity in the temperature range 2-300 K and in magnetic fields up to 9 T. All the results obtained point to delocalized nature of 5f-electrons in this material. The low temperature heat capacity is enhanced (γel ~ 150 mJ/mol-K2) and shows an upturn in Cp/T (T), characteristic of spin fluctuations. The thermal conductivity of U3Si2 is ~8.5 W/m-K at room temperature and we show that the lattice part of the total thermal conductivity is small, with electrons dominating heat transport above 300 K.

Authors:
 [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1478507
Report Number(s):
INL/JOU-17-42333-Rev000
Journal ID: ISSN 0022-3115
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 508; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 36 MATERIALS SCIENCE; U3Si2; nuclear fuel; uranium sequisilicide; thermal conductivity; Electrical transport

Citation Formats

Antonio, Daniel J., Shrestha, Keshav, Harp, Jason M., Adkins, Cynthia A., Zhang, Yongfeng, Carmack, Jon, and Gofryk, Krzysztof. Thermal and transport properties of U3Si2. United States: N. p., 2018. Web. https://doi.org/10.1016/j.jnucmat.2018.05.036.
Antonio, Daniel J., Shrestha, Keshav, Harp, Jason M., Adkins, Cynthia A., Zhang, Yongfeng, Carmack, Jon, & Gofryk, Krzysztof. Thermal and transport properties of U3Si2. United States. https://doi.org/10.1016/j.jnucmat.2018.05.036
Antonio, Daniel J., Shrestha, Keshav, Harp, Jason M., Adkins, Cynthia A., Zhang, Yongfeng, Carmack, Jon, and Gofryk, Krzysztof. Mon . "Thermal and transport properties of U3Si2". United States. https://doi.org/10.1016/j.jnucmat.2018.05.036. https://www.osti.gov/servlets/purl/1478507.
@article{osti_1478507,
title = {Thermal and transport properties of U3Si2},
author = {Antonio, Daniel J. and Shrestha, Keshav and Harp, Jason M. and Adkins, Cynthia A. and Zhang, Yongfeng and Carmack, Jon and Gofryk, Krzysztof},
abstractNote = {Here, we have studied U3Si2 by means of the heat capacity, electrical resistivity, Seebeck and Hall effects, and thermal conductivity in the temperature range 2-300 K and in magnetic fields up to 9 T. All the results obtained point to delocalized nature of 5f-electrons in this material. The low temperature heat capacity is enhanced (γel ~ 150 mJ/mol-K2) and shows an upturn in Cp/T (T), characteristic of spin fluctuations. The thermal conductivity of U3Si2 is ~8.5 W/m-K at room temperature and we show that the lattice part of the total thermal conductivity is small, with electrons dominating heat transport above 300 K.},
doi = {10.1016/j.jnucmat.2018.05.036},
journal = {Journal of Nuclear Materials},
number = C,
volume = 508,
place = {United States},
year = {2018},
month = {5}
}

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Cited by: 4 works
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Figures / Tables:

Figure 1 Figure 1: The temperature dependence of the electrical resistivity of U3Si2. Left inset: the tetragonal unit cell of U3Si2, showing the 2 unique uranium sites. Right inset: electrical resistivity of U3Si2 from this work (solid cyan line) compared to that from ref. [6] (dotted black), ref. [8] (dashed red) andmore » the single room temperature value from ref. [14] (blue star).« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.