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Abstrakt
A series of polycrystalline samples of Y3 M (M = Co, Ni, Rh, Pd, Ir, Pt), intermetallic binary compounds were synthesized by the arc-melting method. Powder x-ray diffraction (pXRD) confirmed the orthorhombic cementite-type crystal structure and allowed for the estimation of the lattice parameters. Physical properties were investigated by means of electrical resistivity and heat capacity measurements between 1.9 K and 300 K. All tested compounds show metallic-like behaviour with RRR values ranging from 1.3 to 8.3, and power-law $\rho \propto {{T}^{n}}$ temperature dependence of resistivity was observed, with $1.6\leqslant n\leqslant 2.2$ . No superconductivity was detected above 1.9 K. The Debye temperature, estimated from the low temperature heat capacity fit, ranged from 180 K (Y3Pt) to 222 K (Y3Co). The highest value of the Sommerfeld coefficient γ was found for Y3Pd (19.5 mJ mol−1 K−2). The pXRD pattern of Y3Rh indicated the presence of Y5Rh2, a previously unreported Pd5B2-type phase, whose unit cell parameters were refined using the LeBail method. Density functional theory calculations were performed and theoretical results revealed strong enhancement of the measured electronic specific heat, which was 30%–100% larger than computed. Quadratic temperature dependence of resistivity and enhanced electronic specific heat indicated a Fermi-liquid behavior of electrons in these materials.
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Autorzy (7)
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Bartłomiej Wiendlocha
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology -
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Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1088/2053-1591/aa6e8d
- Licencja
- Copyright (2017 IOP Publishing Ltd)
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
Materials Research Express
nr 4,
wydanie 6,
strony 1 - 8,
ISSN: 2053-1591 - Język:
- angielski
- Rok wydania:
- 2017
- Opis bibliograficzny:
- Strychalska-Nowak J., Wiendlocha B., Hołowacz K., Reczek P., Podgórski M., Winiarski M., Klimczuk T.: Fermi-liquid behavior of binary intermetallic compounds Y3 M (M = Co, Ni, Rh, Pd, Ir, Pt)// Materials Research Express. -Vol. 4, iss. 6 (2017), s.1-8
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1088/2053-1591/aa6e8d
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 153 razy
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