A study on the magnetocaloric effect in Ti doped manganites Gd0.7Sr0.3Mn1−xTixO3 (x = 0, 0.1 and 0.15)

This work focuses on Magnetic and magnetocaloric properties of doped Gd based manganites; Gd0.7Sr0.3Mn1−xTixO3 (x = 0, 0.1, 0.15) denoted by G, G0.1, G0.15 respectively. Isothermal magnetic entropy change (|ΔS(T)|) shows appreciably high values for the three compounds. For 10 T field, the peak values obtained for magnetic entropy change is 10.4 JKg−1 K−1, 9.6 JKg−1 K−1 and 22.2 JKg−1 K−1respectively for samples G, G0.1, G0.15 at 12.5 K. Interestingly, −ΔS(T) shows a universal behaviour near the transition region at the low temperature. Relative cooling power (RCP) is comparatively high for Gd0.7Sr0.3Mn0.85Ti0.15O3 at low fields, but for high fields Gd0.7Sr0.3MnO3 has comparatively high values for RCP.