Structural, Magnetic, and Magnetocaloric Properties of Pb-Substituted La0.7(Te1-xPbx)0.3MnO3 (0.0 ? x ? 0.3) Manganites
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Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The influence of lead substitution on the magnetocaloric properties of La-0.7(Te1-xPbx)(0.3)MnO3 (0.0 <= x <= 0.3) manganites synthesized by solid-state reaction process was studied both by experimental and theoretical modeling. The X-ray diffraction patterns reveal that samples crystallize in the rhombohedral perovskite structure. Thermomagnetic measurements indicate that the magnetic transition temperature increases gradually from 238 to 262 K with increasing Pb amount in the structure. Maximum magnetic entropy changes (Delta S-M) are determined to be 7.16 for x = 0.0 and 4.76 J kg(-1) K-1 for x = 0.3. Relative cooling power (RCP) values of samples are ranging between 266.94 and 195.21 J kg(-1) at Delta H = 5 T. Due to relatively high Delta S-M and RCP values of the samples, they can be potential materials in magnetic refrigeration applications which work around room temperature.
Açıklama
Anahtar Kelimeler
Manganites, Magnetocaloric effect, Magnetic entropy, Curie temperature, Electron-doped perovskites
Kaynak
Journal of Superconductivity and Novel Magnetism
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
33
Sayı
2