- Tytuł:
- Structural and Magnetocaloric Study οf the $LaFe_{11.0}Co_{0.8}(Si_{0.4}Al_{0.6})_{1.2}$ Alloy
- Autorzy:
-
Gębara, P.
Pawlik, P.
Škorvánek, I.
Marcin, J.
Wysłocki, J. - Powiązania:
- https://bibliotekanauki.pl/articles/1534407.pdf
- Data publikacji:
- 2010-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.30.Sg
75.50.Bb - Opis:
- In this study, we have investigated the microstructure and magnetic entropy change of annealed $LaFe_{11.0}Co_{0.8}(Si_{0.4}Al_{0.6})_{1.2}$ alloy in a form of bulk samples and melt-spun ribbons. The bulk samples were annealed at 1323 K for 20 and 49 days and the maximum values of the magnetic entropy change $| ΔS_M |$ obtained after the change of external magnetic field from 0 to 5 T reached 7.5 J $kg^{-1} K^{-1}$ and 7.7 J $kg^{-1} K^{-1}$, respectively. For the melt-spun ribbon annealed at the same temperature for 1 h, the maximum value of $| ΔS_M |$ reaches 4.5 J $kg^{-1} K^{-1}$. The temperature corresponding to the maximum entropy change increased from 292 K for bulk samples to 295 K for melt-spun ribbons. The lower values of the magnetic entropy change in the melt-spun $LaFe_{11.0}Co_{0.8}(Si_{0.4}Al_{0.6})_{1.2}$ are attributed to the presence of higher volume fraction of the secondary bcc-Fe phase in the ribbon samples.
- Źródło:
-
Acta Physica Polonica A; 2010, 118, 5; 910-912
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki