Gunatilleke, W.
, Zhang, M.
, Wong-Ng, W.
, Zavalij, P.
and Nolas, G.
(2023),
Structural and thermal properties of Eu2Ga11Sn35, Physical Review Materials, [online], https://doi.org/10.1063/5.0119852, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934888
(Accessed April 20, 2024)
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Structural and thermal properties of Eu2Ga11Sn35
Published
Author(s)
Wilarachchige Gunatilleke, Mingjian Zhang, , Peter Zavalij, George S. Nolas
Abstract
Clathrates have been reported in a variety of different structure types, however, inorganic clathrate-I materials with a low-cation concentration have yet to be investigated while tin-based compositions have been much less investigated as compared to silicon or germanium analogs. We report the temperature dependent structural and thermal properties of single-crystal clathrate-I Eu2Ga11Sn35 in revealing the effect of structure and composition on the thermal properties. Specifically, low-temperature heat capacity, thermal conductivity and synchrotron single-crystal X-ray diffraction reveal a departure from Debye-like behavior, glass-like phonon mean free path for this crystalline material, and a relatively large Grüneisen parameter due to the dominance of low-frequency Einstein modes. Our analyses indicate thermal properties that are a result of the structure and composition of this clathrate-I materialsCitation
Physical Review Materials
Volume
133
Pub Type
Journals
Download Paper
Keywords
Type-I clathrates, thermoelectric, Eu2Ga11Sn35, Low-temperature structures, thermal properties
Citation
Created March 3, 2023, Updated April 24, 2023