Abstract
The structural, magnetic and magnetocaloric properties of Zn0.5-xNixMg0.5Fe2O4 (x = 0, 0.125, 0.250) ferrites were investigated in detail. The double sintering ceramic process was used to synthesize our samples. The formation of cubic phase of Zn–Ni–Mg ferrite was confirmed through XRD technique. The structural analysis showed that the unit cell volume decreased with increasing Ni content. All compounds exhibited a ferromagnetic-paramagnetic phase transitions of a second order. The entropy change was obtained from the measurements of magnetic isotherms M(H,T) using the Maxwell relation. The maximum magnetic entropy ΔSMmax decreases from 1.36 J.Kg−1K−1 (x = 0) to 1.16 J.Kg−1K−1 (x = 0.25) under an applied magnetic field of 5T upon increasing Ni content. Relative cooling power (RCP) was determined as well. It was found to be 107 and 90 J/kg for x = 0 and x = 0.25, respectively. These results make our compounds promising materials for magnetic refrigeration technology.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
