We present the large reversible magnetocaloric effect (MCE) of the ferromagnetic semiconductor EuS, which shows a maximum magnetic entropy change of -ΔSmmax~37 J kg-1 K-1, an adiabatic temperature change of ΔTad~10.4 K and a relative cooling power of RCP~782 J kg-1 at 18.5 K for a magnetic field change ΔH=5 T. Particularly, the large MCE is isotropic and without hysteresis loss, even for a magnetic field change of 2 T the values of -ΔSmmax, ΔTad and RCP reach as high as 22 J kg-1 K-1, 7.5 K and 284 J kg-1, respectively. These results indicate that EuS has excellent refrigeration performance at the temperatures near 20 K, and thus can be considered as the potential magnetic refrigerant material for liquefaction of hydrogen.
|Number of pages||5|
|Journal||Solid State Communications|
|Publication status||Published - Sept 2014|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Materials Chemistry