Akademik Veri Yönetim Sistemi
Austin Chemical Engineering, cilt.10, sa.1, ss.1-7, 2023 (Scopus)
In this paper, was investigated the impact of Ti substitution at the Mn-site in manganite on the structural, magnetic, and magnetocaloric properties of the sample Pr0.9Sr0.1Mn0.95Ti0.05O3 prepared by solid-solid reaction. X-ray diffraction was used for the structural studies and the Rietveld refinement shows that the compound is crystallized in a Pnma space group. Williamson-Hall (W-H) analysis was used to determine the crystallites’ sizes. Scanning Electron Microscopy (SEM) was used to determine the surface morphology of the compound and the grain size which was determined using ImageJ software. The magnetic properties are treated using the BS1 magnetometer in which we obtained a phase transition from a ferromagnetic FM state to a paramagnetic PM state around the Curie temperature TC which simply decreases from the mother, indicating the weakness of the double exchange interaction. The sample’s aptitude to be used in magnetic refrigeration demonstrated by the value of maximum entropy |ΔSm max| is 3.7812 J Kg-1.K-1, which corresponds to the best Relative Cooling Power (RCP) 207.1227 J Kg-1 at 5T magnetic field applied compared to Gadolinium (Gd). The Modified Arrott Plot (MAP) is used to understand the FM-PM transition’s nature, and it is through this curve that critical exponent β, γ and curie temperature were determined using the MAP and Fisher methods. The critical coefficient values for β, γ and TC determined by different techniques, are correspondingly similar to the values of the Mean-Field model’s.