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Structural and thermal properties of Eu2Ga11Sn35

Published

Author(s)

Wilarachchige Gunatilleke, Mingjian Zhang, Winnie Wong-Ng, 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 materials
Citation
Physical Review Materials
Volume
133

Keywords

Type-I clathrates, thermoelectric, Eu2Ga11Sn35, Low-temperature structures, thermal properties

Citation

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 14, 2024)
Created March 3, 2023, Updated April 24, 2023