Increased magnetocaloric response of FeMnNiGeSi high-entropy alloys
|Author/s||Law, Jia Yan
Díaz García, Álvaro
Moreno Ramírez, Luis Miguel
Franco García, Victorino
|Department||Universidad de Sevilla. Departamento de Física de la Materia Condensada|
|Abstract||The search for high-entropy alloys (HEAs), a new class of materials, with high magnetocaloric perfor- mance can address the open question about their potential in functional applications. HEAs exist in a vast compositional ...
The search for high-entropy alloys (HEAs), a new class of materials, with high magnetocaloric perfor- mance can address the open question about their potential in functional applications. HEAs exist in a vast compositional space but magnetocaloric HEAs typically exhibit modest magnetocaloric response as they undergo second-order magnetic phase transitions. In this work, through a property-directed search ap- proach, FeMnNiGeSi HEAs with varying Ge/Si ratio are found in the large HEA space to exhibit magneto- structural first-order phase transition. Isothermal entropy change as large as 13 J kg -1 K -1 (for 2.5T) is achieved, which is the largest reported to date for magnetocaloric HEAs. When compared to conventional high-performance magnetocaloric materials, our work is observed to be comparable to many of the con- ventional systems, closing the gap between magnetocaloric HEAs versus conventional magnetocaloric ma- terials for the first time. This opens a new path for the search of functional materials with the optimal mechanical properties of HEAs.
|Funding agencies||European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER)
Junta de Andalucía
Consejería de Economía, Conocimiento, Empresas y Universidad
|Project ID.||PID2019–105720RB- I00
|Citation||Law, J.Y., Díaz García, Á., Moreno Ramírez, L.M. y Franco García, V. (2021). Increased magnetocaloric response of FeMnNiGeSi high-entropy alloys. Acta Materialia, 212, 116931.|