The Inverse and Conventional Magnetocaloric Effects in Ni0.4Cu0.2Zn0.4Fe2-xDyxO4 Nanoferrites Over an Extraordinary Temperature Range

Abstract The magnetocaloric effect (MCE) of Ni 0.4 Cu 0.2 Zn Fe 2- x Dy O 4 ( = 0.02, 0.03, and 0.04) nanoferrites is simulated using a phenomenological model. analysis indicates that the MCE strongly influenced by content in both conventional inverse MCE. For MCE, full-width at half-maximum $$\delta {\text{T}}_{{{\text{FWHM}}}}$$ δ T FWHM ) has significant values, ranging between 200 K 258 for nanoferrites. However, ranges 25 55 K. system covers an extensive temperature range particularly interesting prospect nitrogen hydrogen liquefaction.