Coexistence of normal and inverse magnetocaloric effect in inhomogeneous Ni95Cr5 layers

Understanding of the coexistence of normal and inverse magnetocaloric effects (MCE) makes it promising for use in magnetic cooling applications. This study discusses the selection of Ni95Cr5 layers and their expected magnetocaloric effects for an extended temperature range (200-800 K). These layers offer a wide range of suitable magnetic ordering temperatures as a function of thicknesses. A modified phenomenological model was used to estimate the entropy changes ( & UDelta;SM C and spin-glass transition temperatures, T ( G ), respectively. Based on their & UDelta;Smax -1-K-1) and RCP( = 7.6 to 15.5 J kg(-1)) at the smallest magnetic field of 0.5 kOe, which are comparable to other MCE layer materials. We provide evidence of a strong correlation between the change in magnetic anisotropy (measured in terms of M-R/M-S and H-C) below T ( G ), which subsequently leads to the reversal of & UDelta;SM.

Automated summary

Understanding the coexistence of normal and inverse magnetocaloric effects is important for magnetic cooling applications. This study investigates the selection of Ni95Cr5 layers and their magnetocaloric effects in a wide temperature range. The results show a correlation between the change in magnetic anisotropy and the reversal of magnetocaloric effects.