Papers Magnetic critical behavior and room temperature magnetocaloric effect in Ba1.9Pr0.1FeMoO6 double perovskite compound
MATERIALS RESEARCH BULLETIN(2023)
摘要
In this paper, we report the critical behavior related to the magnetocaloric effect of Ba1.9Pr0.1FeMoO6 double perovskite. A maximum magnetic entropy change, |Delta S-M(max)| similar to 0.68 Jkg(-1)K(-1) and relative cooling power, RCP -62 Jkg(- 1) were observed under applied field of H = 2.5 T. The critical exponents were evaluated by using modified Arrott plots, Kouvel-Fisher, critical isotherm analysis and Widom scaling relation methods. A second order phase transition (paramagnetic to ferromagnetic) was observed at Curie temperature, T-C = 319.73 K with critical exponents beta = 0.45, gamma = 0.84, and delta = 2.91. The value of these critical exponents shows that this sample obeys mean field model and Widom scaling relation. Also, we observed that the different isothermal magneti-zation data are able to collapse into the two branches below and above TC based on the single scaling equa-tion M(H, epsilon) = epsilon(beta)f +/-(H /epsilon(beta+gamma)) that affirms the authenticity of the critical exponents.
更多查看译文
关键词
Magnetocaloric effect,Critical behavior,Double perovskite,Magnetization,XRD
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要