Abstract
The influence of degree of structural order tuned by annealing on magnetocaloric properties of Gd55Co20Al24.5Si0.5 bulk metallic glass (MG) was investigated. It is uncovered that moderate enhancement of structural order can increase the magnetocaloric effect (MCE), but excessive degree of structural order reduces the MCE. Through tuning the degree of structural order, the maximum magnetic entropy change of the MG annealed at 536 K for 60 min reaches 10.8 ± 0.6 JKg-1K−1 under 5 T, which is the highest value of the Gd-based MGs, indicating the promising prospect of these alloys as magnetic refrigerant candidates. Besides, it’s found that the degree of structural order, reflected by the crystallization enthalpy change, and the magnetic entropy change have a good linear correspondence, which sheds new light on the nature of MCE in MGs and is of significance to the design of novel amorphous magnetic refrigerants.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
