- Tytuł:
- Low Temperature Magnetic Properties of $Pr_{0.7}(Ca,Sr)_{0.3}CoO_{3}$ Oxides
- Autorzy:
-
Deac, I.
Vlădescu, A.
Balasz, I.
Tunyagi, A.
Tetean, R. - Powiązania:
- https://bibliotekanauki.pl/articles/1503539.pdf
- Data publikacji:
- 2011-08
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.47.Lx
75.30.Kz
75.30.Sg
73.43.Qt - Opis:
- We have investigated magnetic and magnetocaloric properties of $Pr_{0.7}(Ca_{1-x}Sr_{x})_{0.3}CoO_{3},$ when the average size of the interpolated cation was changed. $Pr_{0.7}Ca_{0.3}CoO_{3}$ has an orthorhombic Pnma symmetry and it shows a magnetic cluster-glass behavior below 70 K. When Sr partially replaces Ca in this compound, its magnetic properties are improved, and it begins to have ferromagnetic-like behavior. The magnetic transition temperature, gradually, increases with increasing Sr content, up to 170 K, for x=1. The electrical conduction also improved when Sr content increased. All the samples show negative magnetoresitance. Magnetic entropy change $\Delta S_{M}$ was estimated from isothermal magnetization data. We have found that it had higher values for the samples with x>0.5, around 1 J/kg K for Δ B=4 T, with reasonable good relative cooling power.
- Źródło:
-
Acta Physica Polonica A; 2011, 120, 2; 306-310
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł