Enhanced RCP and large inverse magnetocaloric effect of CoFe${}_2$O${}_4$ nanoparticles synthesized by auto-combustion method

Abstract

This work focuses on the microstructure, magnetic properties and magnetocaloric effect of CoFe${}_2$O${}_4$ (CFO) nanoparticles elaborated by sol-gel auto combustion method. The XRD investigation indicates that CFO is crystallized in a cubic spinel structure and the SEM micrograph shows a fine quasi-spherical with an average grain sizes of 160 nm. The temperature dependence of the Raman spectra reveals the ferromagnetic to paramagnetic (FM-PM) transition started from 723 K and the magnetization versus temperature measurements shows the Curie temperature located at T${}_{\mathrm{C}}$ = 785 K. Large value of magnetocaloric temperature change of $\Delta$T =11.2 K with a high RCP of 687.56 J Kg${}^{-1}$ are achieved indirectly via the Maxwell approach making our CFO nanopowder suitable candidate for both environmentally friendly magnetic refrigeration and medical applications at ambient temperature.

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Cited by in corpus (1)

• Current Advances in Magnetoelectric Composites with Various Interphase Connectivity Types