Magnetic properties and promising cryogenic magneto-caloric performances of Gd<sub>20</sub>Ho<sub>20</sub>Tm<sub>20</sub>Cu<sub>20</sub>Ni<sub>20</sub> amorphous ribbons*
Yikun Zhang, Bingbing Wu, Dan Guo, Jiang Wang, Zhongming Ren
Abstract
The magnetic cooling utilizing magneto-caloric effect is recognized as promising energy efficiency and environmentally friendly technology. Here we report a systematical study on the microstructures, magnetic properties and cryogenic magneto-caloric performances of the Gd 20 Ho 20 Tm 20 Cu 20 Ni 20 amorphous ribbons. It is found that the ribbons reveal a second-order phase transition and are accompanied by a table-shaped magneto-caloric effect. The calculated magnetic-entropy-change maximum |Δ S M |, temperature averaged entropy change (i.e., TEC(10)), and refrigerant capacity reach 13.9 J/kg⋅K, 13.84 J/kg⋅K and 740 J/kg with magnetic field change of 0–7 T, respectively, indicating that the present Gd 20 Ho 20 Tm 20 Cu 20 Ni 20 amorphous ribbons are good candidates for magnetic cooling.