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

Künye