Observation of the magnetic entropy change in Zn doped MnFe2O4 common ceramic: Be cool being environmental friendly

We report the detail investigation on the magnetic and magnetocaloric behaviour of polycrystalline Mn1-xZnxFe2O4 (0.0 ≤ x ≤ 0.7) ferrite. The magnetization analysis shows that the increase of Zn concentration in the samples results in decrease of saturation magnetization. The maximum magnetic entropy change, |ΔSMmax| is evaluated through M-H isotherms measurements and takes values of 1.25, 1.11, 1.07, and 0.64 Jkg−1K−1 for x = 0.0, 0.3, 0.5, and 0.7, respectively under a maximum applied magnetic field of 2.5 T. The corresponding relative cooling power (RCP) for these samples were found to be 102, 162, 96, and 89 Jkg-1 for x = 0.0, 0.3, 0.5, and 0.7, respectively. After the comparison of the obtained values of |ΔSMmax| and RCP with those reported earlier for the other compounds, recommend to explore such common soft ferrites based materials for magnetic refrigeration. Relative cooling power values (RCP) vs. applied magnetic field (H) for Mn1-xZnxFe2O4 (0.0 ≤ x ≤ 0.7) samples. [Display omitted] •Room temperature magnetic refrigeration.•A tunable magnetocaloric effect and refrigeration working temperature.•The variation in entropy change has been explained by doping effect.•These soft ferrites can find application in solid state refrigeration.