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Abstract
Single crystals of SrCo2Al and BaCo2Al9 were grown using a self-flux method. A LeBail analysis of the powder X-ray diffraction patterns show that both compounds crystallize in a hexagonal (P6/mmm) crystal structure with lattice parameters: a = 7.8995(1) Å, c = 3.9159(1) Å for SrCo2Al9, and a = 7.9162(2) Å, c = 3.9702(1) Å for BaCo2Al9 aluminide. The low temperature analysis of the heat capacity measurements give a Sommerfeld coefficient γ = 4.99(6) mJ mol−1 K−2 for SrCo2Al9 and almost twice larger γ = 7.94(9) mJ mol−1 K−2 for BaCo2Al9. Resistivity measurements show metallic-like behavior, with reasonably large residual resistivity ratio RRR = 6 and 10 for SrCo2Al9 and BaCo2Al9, respectively. Neither heat capacity nor resistivity measurements reveal any phase transition down to 1.8 K.
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF SOLID STATE CHEMISTRY
no. 289,
ISSN: 0022-4596 - Language:
- English
- Publication year:
- 2020
- Bibliographic description:
- Ryżyńska Z., Klimczuk T., Winiarski M.: Single crystal growth and physical properties of MCo2Al9 (M= Sr, Ba)// JOURNAL OF SOLID STATE CHEMISTRY -Vol. 289, (2020), s.121509-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jssc.2020.121509
- Verified by:
- Gdańsk University of Technology
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