MgPdSb-An Electron-Deficient Half-Heusler Phase

被引：0

作者：

Winiarski, Michal J. ^{[1
,2
]}

Stolecka, Kamila ^{[1
,2
]}

Litzbarski, Leszek ^{[1
,2
,3
]}

Tran, Thao T. ^{[4
]}

Gornicka, Karolina ^{[1
,2
]}

Klimczuk, Tomasz ^{[1
,2
]}

机构：

[1] Gdansk Univ Technol, Fac Appl Phys & Math, PL-80232 Gdansk, Poland

[2] Gdansk Univ Technol, Adv Mat Ctr, PL-80232 Gdansk, Poland

[3] Gdansk Univ Technol, Fac Elect & Control Engn, Dept Mechatron & High Voltage Engn, PL-80232 Gdansk, Poland

[4] Clemson Univ, Dept Chem, Clemson, SC 29634 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2022年 / 126卷 / 33期

关键词：

INTERMETALLIC COMPOUNDS; ELECTRONEGATIVITY; PSEUDOPOTENTIALS; RULE;

D O I：

10.1021/acs.jpcc.2c01367AJ

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 F (4) over bar 3m 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 angstrom for MgPdSb and MgPd1.25Sb, respectively. The Debye temperature and Sommerfeld coefficient for MgPdSb are Theta(D) = 282 K and gamma = 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.

引用

页码：14229 / 14235

页数：7

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