Magnetocaloric refrigeration is a solid-state cooling approach that promises high energy efficiency and low environmental impact. It remains uncompetitive with conventional vapor-compression technologies due to lack of high-performing materials that exhibit large magnetocaloric effects in low magnetic fields. Here we report a game-changing enhancement of the magnetocaloric response in a transition-metal-based Ni-Co-Mn-Ti. Mechanically and chemically stable rapidly solidified ribbons exhibit magnetic entropy changes as high as ~27 J⋅kg-1K-1 for a moderate field change of 2 T, comparable to or larger than the best known materials for near-room temperature applications. The ribbons can be easily manufactured in large quantities and the transition temperature can be adjusted by varying Co concentration.
Available at: http://works.bepress.com/duane_johnson/128/
This is a manuscript of an article published as Bez, Henrique Neves, Arjun K. Pathak, Anis Biswas, Nikolai Zarkevich, Viktor Balema, Yaroslav Mudryk, Duane D. Johnson, and Vitalij K. Pecharsky. "Giant enhancement of the magnetocaloric response in Ni-Co-Mn-Ti by rapid solidification." Acta Materialia 173 (2019): 225-230. DOI: 10.1016/j.actamat.2019.05.004. Posted with permission.