Pages 100-107 M.S. Anwar, Faheem Ahmed, Bon Heun Koo
Isothermal magnetic entropy change for Ni1−xZnxFe2O4samples at different temperatures under the applied magnetic field up to 2.5T. We report detail study on the structural, magnetic, and magnetocaloric properties of Zn doped nickel–zinc ferrites with different Zn-concentrations. A maximum in magnetic entropy change,|ΔSMmax|(∼1.39Jkg−1K−1at 2.5T) has been observed in Ni0.7Zn0.3Fe2O4sample. The width of magnetic entropy curve was found to increase with the Zn concentration. Also, the|ΔSMmax|and relative cooling power were found to increase with increasing the applied magnetic field, which indicates much larger cooling power to expected at higher magnetic field. This investigation suggests that Ni1−xZnxFe2O4(0.0⩽x⩽0.7) ferrite samples can be a possible candidate for magnetic refrigerating material with wide range of temperature.