- Tytuł:
- Isostructural Transition in RTAl Compounds at High Temperatures
- Autorzy:
-
Prchal, J.
Javorský, P.
de Boer, F.
Moleman, A. - Powiązania:
- https://bibliotekanauki.pl/articles/1813676.pdf
- Data publikacji:
- 2008-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
61.50.Ks
61.05.cp - Opis:
- Based on previously discovered forbidden values of the c/a ratio, we studied anomalies in the temperature evolution of the lattice parameters (a, c) of several hexagonal RTAl compounds at high temperatures (above room temperature). The compound $ErNi_{0.45}Cu_{0.55}Al$, that seemed to be impossible to be prepared in single-phase form, reaches the single-phase state at temperatures above 493 K (220°C). On the other hand, the compound $TbNi_{0.7}Cu_{0.3}Al$ - that was expected to undergo a first-order structural phase transition at high temperatures - exhibits a second-order type transition when approaching the critical values of the c/a ratio. These results are in agreement with idea of a forbidden range of c/a values in these compounds.
- Źródło:
-
Acta Physica Polonica A; 2008, 113, 1; 335-338
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł