Regular Article

Investigation on magnetic and magnetocaloric properties of Sr_0.25Ca_0.75Mn_0.9Ti_0.1O₃ perovskite

¹ Department of Physics, Pondicherry Engineering College, Puducherry, India
² Department of Physics, KMGIPSR, Puducherry, India
³ Department of Physics, Aditya Institute of Management Science and Research, Puducherry, India

^* e-mail: d.mohanradheep@gmail.com

Received: 5 February 2023
Received in final form: 27 April 2023
Accepted: 15 May 2023
Published online: 13 June 2023

Abstract

Interest in magnetic refrigeration, which is based on the magnetocaloric effect (MCE), has greatly increased during the past two decades. As a less-polluting and more effective cooling technology than gas compression, magnetic refrigeration is one of the prominent and possible options. Perovskite Oxides played a major contribution for the development of magnetic refrigeration (MR). Sr_0.25Ca_0.75Mn_1-xTi_xO₃ (x = 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8) polycrystalline samples were synthesized by conventional solid-state reaction. Its cubic perovskite-type crystal structure is discovered to be of the Pm-3m space group. At T = 31.3 K, the alloy experiences antiferromagnetic transition for the composition of Sr_0.25Ca_0.75Mn_0.9Ti_0.1O₃. It demonstrates that the greatest magnetocaloric reports are 8 J/kg K for a magnetic field of 7 Tesla and 3.2 J/kg K for 1 Tesla. These (ΔS_M) value is comparable to the magnetization values of the ferromagnetic Heusler alloys and are very high in these kinds of antiferromagnetic perovskite systems. For the Sr_0.25Ca_0.75Mn_0.9Ti_0.1O₃ material, this is the first report of substantial magnetic entropy changes brought on by a weak magnetic field.