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