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

Abstract This work focuses on Magnetic and magnetocaloric properties of doped Gd based manganites; Gd 0.7 Sr 0.3 Mn 1−x Ti x O 3 (x = 0, 0.1, 0.15) denoted by G, G 0.1 , G 0.15 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 −1 respectively for samples G, G 0.1 , G 0.15 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 Gd 0.7 Sr 0.3 Mn 0.85 Ti 0.15 O 3 at low fields, but for high fields Gd 0.7 Sr 0.3 MnO 3 has comparatively high values for RCP.