- Tytuł:
- Low Temperature Properties of the $Ce_{1-x}La_{x}NiAl_4$
- Autorzy:
-
Toliński, T.
Kowalczyk, A.
Reiffers, M.
Šebek, J.
Šantavá, E.
Curlik, I.
Ilkovič, S. - Powiązania:
- https://bibliotekanauki.pl/articles/1534742.pdf
- Data publikacji:
- 2010-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.27.+a
65.40.Ba
75.30.Mb - Opis:
- Measurements of the heat capacity in ultralow temperatures (down to 350 mK) have been carried out for $Ce_{1-x}La_{x}NiAl_4$. The paramagnetic behavior above about 30 K can be well described by the Curie-Weiss magnetic susceptibility. The undoped CeNiAl_4 compound is a known heavy fermion system with a large electronic specific heat coefficient (γ = 0.5 J $mol^{-1} K^{-2}$) and the Kondo temperature in the range 30-80 K. In the case of the $Ce_{0.8}La_{0.2}NiAl_4$ and $Ce_{0.6}La_{0.4}NiAl_4$ compounds a peak in C/T appears below 2 K, which is strongly damped by the magnetic field. It is probably connected with the Kondo and/or magnetic interactions and the electronic specific heat coefficient is 0.19 J $mol^{-1} K^{-2}$ (0.43 J $mol^{-1} K^{-2}$) for x = 0.2 (x = 0.4) at T → 0. The value determined above the peak, at temperature for which the magnetic field starts to decrease γ ( ≈ 3 K), is about 0.5 J $mol^{-1} K^{-2}$ and the effect of the magnetic field can be well analyzed in frames of the single-ion Kondo model.
- Źródło:
-
Acta Physica Polonica A; 2010, 118, 5; 933-935
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł