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Tuning Magnetocaloric Properties for La_1-xSr_xCoO₃

DOI: 10.21883/FTT.2021.10.51478.PSS162

Ahmed E.M.¹, Alamri H.R.², Elghnam S.M.³, Eldarawi O.⁴, Tawfik T.E.⁴, Mahmoud A.M.⁴, Elwan S.E.⁵, Hemeda O.M.⁶, Hamad M.A.⁷, Hussein G.A.⁵

¹Department of Physics, College of Science, Taif University, P.O. Box Taif,, Saudi Arabia
²Physics Department, Aljamoum University College, Umm Al-Qura University, Makkah, Saudi Arabia
³Physics Department, Faculty of Science, Alexandria University, Alexandria, Egypt
⁴Basic Science Department, Higher Institute of Engineering and Technology, King Marriott, Alexandria, Egypt
⁵Department of Communication and Electronics, Higher Institute of Engineering and Technology, King Marriott, Alexandria, Egypt
⁶Physics Department, Faculty of Science, Tanta University, Tanta, Egypt
⁷Basic Science Department, Higher Institute of Engineering and Technology, Alexandria, Egypt

Email: m_hamad76@yahoo.com

Поступила в редакцию: 16 марта 2021 г.

Выставление онлайн: 9 июля 2021 г.

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Low magnetic field magnetocaloric (MC) properties of La_1-xSr_xCoO₃ (x=0.3 and 0.5) near phase transition from a ferromagnetic to a paramagnetic state were investigated. It is shown that the change of Sr content allows MC effect in La_1-xSr_xCoO₃ to be tunable, which is more practical for construction of MC refrigeration. MC properties of the x=0.5 sample are significantly greater than that of the x=0.3 one. Furthermore, the results show that MC properties of La_1-xSr_xCoO₃ samples are significantly larger, and comparable with some MC properties of many materials like Gd_1-xCa_xBaCo₂O_5.5 and Ge_0.95Mn_0.05. Keywords: magnetocaloric effect, La_1-xSr_xCoO₃, magnetic entropy change.

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