Crystal structure and physical properties of new Ca2TGe3 (T = Pd and Pt) germanides

T. Klimczuk; Weiwei Xie; M. J. Winiarski; R. Kozioł; L. S. Litzbarski; Huixia Luo; R. J. Cava

doi:10.1016/j.jssc.2016.07.029

Crystal structure and physical properties of new Ca₂TGe₃ (T = Pd and Pt) germanides

T. Klimczuk, Weiwei Xie, M. J. Winiarski, R. Kozioł, L. S. Litzbarski, Huixia Luo, R. J. Cava

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The crystallographic, electronic transport and thermal properties of Ca₂PdGe₃ and Ca₂PtGe₃ are reported. The compounds crystalize in an ordered variant of the AlB₂ crystal structure, in space group P6/mmm, with the lattice parameters a = 8.4876(4) Å/8.4503(5) Å and c = 4.1911(3) Å/4.2302(3) Å for Ca₂PdGe₃ and Ca₂PtGe₃, respectively. The resistivity data exhibit metallic behavior with residual-resistivity-ratios (RRR) of 13 for Ca₂PdGe₃ and 6.5 for Ca₂PtGe₃. No superconducting transition is observed down to 0.4 K. Specific heat studies reveal similar values of the Debye temperatures and Sommerfeld coefficients: Θ_D = 298 K, γ = 4.1 mJ mol⁻¹ K⁻² and Θ_D = 305 K, γ = 3.2 mJ mol⁻¹ K⁻² for Ca₂PdGe₃ and Ca₂PtGe₃, respectively. The low value of γ is in agreement with the electronic structure calculations.

Original language	English (US)
Pages (from-to)	95-100
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	243
DOIs	https://doi.org/10.1016/j.jssc.2016.07.029
State	Published - Nov 1 2016

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

AlB2-type structure
Germanides
Intermetallic compounds

Access to Document

10.1016/j.jssc.2016.07.029

Cite this

@article{b15f5e896bcc40e5bbe7cf5cb2e6ab0a,

title = "Crystal structure and physical properties of new Ca2TGe3 (T = Pd and Pt) germanides",

abstract = "The crystallographic, electronic transport and thermal properties of Ca2PdGe3 and Ca2PtGe3 are reported. The compounds crystalize in an ordered variant of the AlB2 crystal structure, in space group P6/mmm, with the lattice parameters a = 8.4876(4) {\AA}/8.4503(5) {\AA} and c = 4.1911(3) {\AA}/4.2302(3) {\AA} for Ca2PdGe3 and Ca2PtGe3, respectively. The resistivity data exhibit metallic behavior with residual-resistivity-ratios (RRR) of 13 for Ca2PdGe3 and 6.5 for Ca2PtGe3. No superconducting transition is observed down to 0.4 K. Specific heat studies reveal similar values of the Debye temperatures and Sommerfeld coefficients: ΘD = 298 K, γ = 4.1 mJ mol−1 K−2 and ΘD = 305 K, γ = 3.2 mJ mol−1 K−2 for Ca2PdGe3 and Ca2PtGe3, respectively. The low value of γ is in agreement with the electronic structure calculations.",

keywords = "AlB2-type structure, Germanides, Intermetallic compounds",

author = "T. Klimczuk and Weiwei Xie and Winiarski, {M. J.} and R. Kozio{\l} and Litzbarski, {L. S.} and Huixia Luo and Cava, {R. J.}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Inc.",

year = "2016",

month = nov,

day = "1",

doi = "10.1016/j.jssc.2016.07.029",

language = "English (US)",

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T1 - Crystal structure and physical properties of new Ca2TGe3 (T = Pd and Pt) germanides

AU - Klimczuk, T.

AU - Xie, Weiwei

AU - Winiarski, M. J.

AU - Kozioł, R.

AU - Litzbarski, L. S.

AU - Luo, Huixia

AU - Cava, R. J.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The crystallographic, electronic transport and thermal properties of Ca2PdGe3 and Ca2PtGe3 are reported. The compounds crystalize in an ordered variant of the AlB2 crystal structure, in space group P6/mmm, with the lattice parameters a = 8.4876(4) Å/8.4503(5) Å and c = 4.1911(3) Å/4.2302(3) Å for Ca2PdGe3 and Ca2PtGe3, respectively. The resistivity data exhibit metallic behavior with residual-resistivity-ratios (RRR) of 13 for Ca2PdGe3 and 6.5 for Ca2PtGe3. No superconducting transition is observed down to 0.4 K. Specific heat studies reveal similar values of the Debye temperatures and Sommerfeld coefficients: ΘD = 298 K, γ = 4.1 mJ mol−1 K−2 and ΘD = 305 K, γ = 3.2 mJ mol−1 K−2 for Ca2PdGe3 and Ca2PtGe3, respectively. The low value of γ is in agreement with the electronic structure calculations.

AB - The crystallographic, electronic transport and thermal properties of Ca2PdGe3 and Ca2PtGe3 are reported. The compounds crystalize in an ordered variant of the AlB2 crystal structure, in space group P6/mmm, with the lattice parameters a = 8.4876(4) Å/8.4503(5) Å and c = 4.1911(3) Å/4.2302(3) Å for Ca2PdGe3 and Ca2PtGe3, respectively. The resistivity data exhibit metallic behavior with residual-resistivity-ratios (RRR) of 13 for Ca2PdGe3 and 6.5 for Ca2PtGe3. No superconducting transition is observed down to 0.4 K. Specific heat studies reveal similar values of the Debye temperatures and Sommerfeld coefficients: ΘD = 298 K, γ = 4.1 mJ mol−1 K−2 and ΘD = 305 K, γ = 3.2 mJ mol−1 K−2 for Ca2PdGe3 and Ca2PtGe3, respectively. The low value of γ is in agreement with the electronic structure calculations.

KW - AlB2-type structure

KW - Germanides

KW - Intermetallic compounds

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