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Abstract
The half-Heusler family consists of many semiconducting intermetallic compounds, virtually all of them having a valence electron count (VEC) of 18. We have studied an electron-deficient (VEC = 17) phase MgPdSb and its Pd-stuffed variant MgPd1.25Sb. The cubic F4̅3m crystal structure was confirmed by the Rietveld refinement of powder X-ray diffraction (XRD) data. The lattice parameter is a = 6.284 and 6.335 Å for MgPdSb and MgPd1.25Sb, respectively. The Debye temperature and Sommerfeld coefficient for MgPdSb are ΘD = 282 K and γ = 3.3 mJ mol–1 K–2, respectively, and are similar to those obtained for MgPd1.25Sb. There is neither phase transition nor superconductivity observed above 1.8 K. The differences between the electronic structures of Mg-based half-Heusler compounds make them robustly metallic, irrespective of the electron count and the introduction of interstitial transition metal (Pd) atoms.
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Authors (6)
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Thao Tran
- Clemson University, USA
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acs.jpcc.2c01367
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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Journal of Physical Chemistry C
no. 126,
pages 14229 - 14235,
ISSN: 1932-7447 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Winiarski M., Stolecka K., Litzbarski L., Tran T., Górnicka K., Klimczuk T.: MgPdSb─An Electron-Deficient Half-Heusler Phase// Journal of Physical Chemistry C -Vol. 126,iss. 33 (2022), s.14229-14235
- DOI:
- Digital Object Identifier (open in new tab) 10.1021/acs.jpcc.2c01367
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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