Magnetic and magnetocaloric properties of 0.5La0.7Ca0.2Sr0.1MnO3/0.5La0.7Te0.3MnO3 composite

Yıl 2020, Cilt: 41 Sayı: 1, 144 - 151, 22.03.2020

Gönül Akça Selda Kılıç Çetin Ahmet Ekicibil

https://doi.org/10.17776/csj.619932

Cited By: 1

Öz

In this work, the magnetic and magnetocaloric
properties of 0.5La_0.7Ca_0.2Sr_0.1MnO₃/0.5La_0.7Te_0.3MnO₃
composite have been investigated. The 0.5La_0.7Ca_0.2Sr_0.1MnO₃/0.5La_0.7Te_0.3MnO₃
composite has been composed by mixing the La_0.7Ca_0.2Sr_0.1MnO₃
and La_0.7Te_0.3MnO₃ manganites with a ratio of
0.5:0.5, synthesized by using the standard solid state method. In order to investigate
the magnetic and magnetocaloric properties of the samples, magnetization
measurements dependence on temperature and magnetic field have been performed
by using physical property measurement system. The nature of the magnetic phase
transition for all materials has been identified by using Banerjee criterion
and Landau theory and according to both methods the magnetic phase transition is
second order. Magnetic entropy change values have been calculated by using
Maxwell relation and Landau theory. Based on Maxwell relation, the maximum
magnetic entropy change value of the composite has been calculated as 3.70 Jkg^-1K^-1
for 5 T. 

Anahtar Kelimeler

Composite, Magnetocaloric effect, magnetic entropy change, Maxwell theory, Landau theory

Destekleyen Kurum

Research Fund of Çukurova University

Proje Numarası

FBA-2018-10363

Teşekkür

This work is supported by the Research Fund of Çukurova University, Adana, Turkey, under grant contracts no: FBA-2018-10363.

Kaynakça

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