Abstract
The magnetism and magnetocaloric performances of rapidly solidified RE60Co20Ni20 (RE = Ho and Er) amorphous ribbons have been investigated in this work. Both ribbons undergo a second-ordered magnetic transition from ferromagnetic (FM) to paramagnetic (PM) state. The magnetocaloric performances of RE60Co20Ni20 (RE = Ho and Er) ribbons have been characterized using magnetic entropy change (ΔSM), temperature averaged entropy change (TEC), relative cooling power (RCP) as well as refrigeration capacity (RC). With the external magnetic field change from 0 to 5 T, the maximal ΔSM values (−ΔSMmax) for Ho60Co20Ni20 and Er60Co20Ni20 are calculated to be 18.4 and 15.5 J/kg-K, respectively. The corresponding RCP (RC) values reach 668.2 (518.5) and 403.2 (320.3) J/kg. The present investigation highlights the potential of RE60Co20Ni20 ribbons as magnetic refrigerant materials at low temperature region.
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