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Abstract
Pseudo-ternary solid solutions, Lu(Ni1-xCox)C2 (0 ≤ x ≤ 1), were studied by means of powder X-ray diffraction, differential thermal analysis as well as electrical resistivity and heat capacity measurements. The crystal structure of the Lu(Ni1-xCox)C2 series, as investigated by means of X-ray powder diffraction, is of structure type CeNiC2, space group Amm2, Pearson symbol oS8. The structural analysis reveals a non-monotonous evolution, in particular for the a- and c-lattice parameters, resulting in a non-linear decrease of the unit cell volume, markedly deviating from Vegard’s rule, due to non-isoelectronic substitution of Ni by Co. Utilizing differential thermal analysis (DTA) data, a pseudo-binary phase diagram LuNiC2–LuCoC2 has been constructed. The evolution of charge density wave order in Lu(Ni1-xCox)C2, which reaches an ordering temperature TCDW ≅ 450 K for LuNiC2, was studied by means of electrical resistivity and heat capacity measurements. For solid solutions prepared via the floating-zone melting technique it became feasible to trace charge density wave (CDW) features of the temperature dependent electrical resistivity, thus, indicating a critical composition for the suppression of CDW order in Lu(Ni1-xCox)C2 at around x ≈ 0.15 – 0.17, which matches with a distinct drop of the composition dependent electronic Sommerfeld coefficient of the low temperature heat capacity of Ni-rich solid solutions.
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Authors (9)
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Herwig Michor
- nstitute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8–10, A-1040 Wien, Austria
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Lisa Reisinger
- nstitute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8–10, A-1040 Wien, Austria
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Maria Fritthum
- nstitute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8–10, A-1040 Wien, Austria
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Jana Schmelzenbart
- nstitute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8–10, A-1040 Wien, Austria
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Alexander Vock
- nstitute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8–10, A-1040 Wien, Austria
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Volodymyr Levytskyi
- Institut für Experimentelle Physik, TU Bergakademie Freiberg, Leipziger Straße 23, 09596 Freiberg, Germany
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Volodymyr Babizhetskyy
- Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Str. 6, 79005 Lviv, Ukraine
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Bogdan Kotur
- Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Str. 6, 79005 Lviv, Ukraine
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Full text
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- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2024.173631
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF ALLOYS AND COMPOUNDS
no. 980,
ISSN: 0925-8388 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Michor H., Roman M., Reisinger L., Fritthum M., Schmelzenbart J., Vock A., Levytskyi V., Babizhetskyy V., Kotur B.: Evolution of charge density wave order in continuous solid solutions Lu(Ni1-xCox)C2// JOURNAL OF ALLOYS AND COMPOUNDS -Vol. 980,iss. 173631 (2024), s.1-7
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2024.173631
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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