Excellent Magnetocaloric Properties near 285 K of Amorphous Fe88Pr6Ce4B2 Ribbon

A novel amorphous Fe88Pr6Ce4B2 ribbon with better magnetocaloric properties near 285 K is reported in the present work. The Fe88Pr6Ce4B2 ribbon exhibits a typical second-order ferromagnetic-paramagnetic transition near its Curie temperature (T-c, similar to 284 K), with a maximum magnetic entropy change (-Delta S-m(peak)) of similar to 4.15 J/(kg x K) under 5 T and a maximum adiabatic temperature rise (Delta T-ad) of similar to 2.57 K under 5 T, both of which are almost the largest amongst the iron-based metallic glasses with T-c = 285 +/- 10 K. The high -Delta S-m(peak) enables several amorphous hybrids with table-like -Delta S-m-T curves to be synthesized by appropriately proportioning the Fe88Pr6Ce4B2 ribbon and other amorphous ribbons with different T-c. The larger average -Delta S-m and effective refrigeration capacity, as well as the appropriate temperature range, make the two amorphous hybrids potential candidates for use as refrigerants in household magnetic air conditioners.