Increased magnetocaloric response of FeMnNiGeSi high-entropy alloys
| Autor: | Victorino Franco, Jia Yan Law, Álvaro Díaz-García, L.M. Moreno-Ramírez |
|---|---|
| Přispěvatelé: | Universidad de Sevilla. Departamento de Física de la Materia Condensada, European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER), Junta de Andalucía, Consejería de Economía, Conocimiento, Empresas y Universidad |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Functional properties Phase transition Work (thermodynamics) Materials science Polymers and Plastics High-entropy alloys High entropy alloys Magnetocaloric effect Metals and Alloys Thermodynamics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Isothermal process First-order phase transitions Electronic Optical and Magnetic Materials Entropy (classical thermodynamics) Magneto-structural transformations 0103 physical sciences Ceramics and Composites Magnetic refrigeration Magnetic phase 0210 nano-technology |
| Zdroj: | idUS. Depósito de Investigación de la Universidad de Sevilla instname |
| Popis: | 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. FEDER, Unión Europea PID2019–105720RB- I00 Junta de Andalucía US-1260179 Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía P18-RT-746 |
| Databáze: | OpenAIRE |
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