Giant enhancement of the magnetocaloric response in Ni–Co–Mn–Ti by rapid solidification. (July 2019)

• Record Type: Journal Article
• Authors: Neves Bez, Henrique; Pathak, Arjun K.; Biswas, Anis; Zarkevich, Nikolai; Balema, Viktor; Mudryk, Yaroslav; Johnson, Duane D.; Pecharsky, Vitalij K.
• Is Part Of: Acta materialia. Volume 173(2019)
• Page Start: 225
• Page End: 230
• Publication Date: 2019-07
• Subjects: Multicaloric -- Magnetocaloric -- Shape memory -- Magnetic refrigeration; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2019.05.004
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: 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 −1 K −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. Graphical abstract: Image 1