Structural, Magnetic and Magnetocaloric Properties of Pr0.68Ca0.32-x Bi x MnO3 (x=0, 0.1, 0.18, 0.26 and 0.32) Compounds
Küçük Resim Yok
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The structural, magnetic and magnetocaloric properties of the polycrystalline Pr0.68Ca0.32-x Bi (x) MnO3 (x = 0, 0.1, 0.18, 0.26 and 0.32) samples were studied. X-ray analyses indicated that all samples have a single phase of orthorhombic symmetry. The charge-order transition was observed for the x = 0 sample at T (CO)= 200 K, and it disappears with further Bi doping of the sample. The Curie temperature, saturation magnetisation and magnetocaloric effect decrease with increasing Bi content. The decrease in Curie temperature and saturation magnetisation was attributed to magnetic inhomogeneity and weakening of double-exchange interaction in the Bi-doped samples. The decrease in saturation magnetisation and the changed nature of phase transition give rise to a decrease in magnetic entropy change.
Açıklama
Anahtar Kelimeler
Manganites, Bi substitution, Magnetic properties, Magnetocaloric effect
Kaynak
Journal of Superconductivity and Novel Magnetism
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
29
Sayı
9
