Structural, magnetic, and magnetocaloric properties of (1-x)La0.7Ca0.3MnO3/(x)La0.7Ag0.3MnO3 composites
Küçük Resim Yok
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, structural, magnetic, and magnetocaloric properties of (1 - x)La0.7Ca0.3MnO3/(x)La0.7Ag0.3MnO3 (x = 0, 0.25, 0.50, 0.75, and 1) composites were investigated in detail. The X-ray diffraction has indicated that the samples have a single phase without any detectable impurity. SEM analysis revealed that samples consist of irregularly shaped and strongly connected particles and grain boundaries become unclear with increasing x. The magnetic measurements revealed that the parent compounds exhibit a ferromagnetic to paramagnetic phase transition. The magnetization curves for composite samples exhibited two magnetic phase transitions nearly same temperature that of the parent compounds. The maximum value of magnetic entropy change (| increment S-m|) decreased from 8.02 for x = 0 to 4.1 J/kg K for x = 0.75 at 5 T magnetic field change. Overlapping entropy peaks becomes almost flat over a wide temperature range for composite samples inducing an enhancement of the RCP (= 273.96 J/kg for x = 0.75 at 5 T magnetic field change). Arrott plots showed a second-order magnetic phase transition for composite samples and also confirmed in terms of Landau theory.
Açıklama
Anahtar Kelimeler
[No Keywords]
Kaynak
Journal of Materials Science-Materials in Electronics
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
33
Sayı
7
