Age stability of La(Fe,Si)13 hydrides with giant magnetocaloric effects
| Autor: | S. Miraglia, Yi Long, Hu Zhang, He Zhou, Florence Porcher |
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| Přispěvatelé: | University of Science and Technology Beijing [Beijing] (USTB), Matériaux, Rayonnements, Structure (NEEL - MRS), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), LLB - Nouvelles frontières dans les matériaux quantiques (NFMQ), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Beijing Normal University (BNU) |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Magnetocaloric effect Neutron diffraction Analytical chemistry Working temperature 02 engineering and technology 01 natural sciences Low magnetic field 0103 physical sciences Metallic materials Materials Chemistry Magnetic refrigeration Curie Physical and Theoretical Chemistry Saturation (magnetic) La(Fe [PHYS]Physics [physics] 010302 applied physics Hydrides Metals and Alloys Si) 13 021001 nanoscience & nanotechnology Condensed Matter Physics Linear relationship 0210 nano-technology Stability |
| Zdroj: | Rare Metals Rare Metals, 2021, 41, pp.992-1001. ⟨10.1007/s12598-021-01849-3⟩ |
| ISSN: | 1867-7185 1001-0521 1743-1336 |
| DOI: | 10.1007/s12598-021-01849-3 |
| Popis: | The Curie temperatures (TC) of La0.7Ce0.3Fe13-x-yMnxSiy compounds that are hydrogenated to saturation are raised to near room temperature. The age stability was investigated for the fully hydrogenated La0.7Ce0.3Fe11.5-xMnxSi1.5 compounds. This result indicates that the H content will slowly decrease in the hydrides, leading to a decrease in TC. However, no age splitting is observed after the hydrides are held at room temperature for two years, indicating the excellent age stability of the hydrides. Further structural analysis by neutron diffraction shows that Mn atoms preferentially substitute Fe in the 96i sites. The TC of La0.7Ce0.3Fe11.55-yMnySi1.45 hydrides can be adjusted to the desired working temperature by regulating Mn content based on the linear relationship between TC and Mn content. Moreover, the La0.7Ce0.3Fe11.55-yMnySi1.45 hydrides exhibit a giant magnetic entropy change of 15 J·kg−1·K−1 under a low magnetic field change of 0−1 T. As a result, the giant magnetocaloric effect, linearly adjustable TC, and excellent age stability make the La0.7Ce0.3Fe11.55-yMnySi1.45 hydrides be one of the ideal candidates for room temperature magnetic refrigerants. |
| Databáze: | OpenAIRE |
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