Magnetic behaviour and experimental study of the magnetocaloric effect in the pseudobinary Laves phase Er1−xDyxCo2
| Autor: | Mohamed Balli, Daniel Fruchart, Damien Gignoux |
|---|---|
| Přispěvatelé: | Micro et NanoMagnétisme (MNM), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Institute of Thermal Sciences and Engineering, University of Applied Sciences of Western Switzerland |
| Rok vydání: | 2011 |
| Předmět: |
Diffraction
Thermodynamics 02 engineering and technology Crystal structure Laves phase 01 natural sciences Isothermal process Magnetization 0103 physical sciences Materials Chemistry Magnetic refrigeration PIEnergie RCo2Lavesphases 010306 general physics Magnetocaloriceffect [PHYS]Physics [physics] Condensed matter physics Chemistry Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology Landau theory Metamagnetism Mechanics of Materials Curie temperature 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds Journal of Alloys and Compounds, Elsevier, 2011, 509, pp.3907. ⟨10.1016/j.jallcom.2010.12.161⟩ |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2010.12.161 |
| Popis: | International audience; We have investigated the crystal structure, the bulk magnetization characteristics and the magnetocaloric properties of Er1−xDyxCo2 compounds. X-ray diffraction (XRD) analyses confirm that all these Lavesphase type compounds crystallize in the cubic MgCu2-type structure. First, the magnetization behaviour and the magnetic transition are analyzed in terms of Landau theory. Then, a direct correlation was pointed out between the character of the magnetic transition and the behaviour of the cell parameter versus x. Substitution of Dy to Er enhances markedly the Curie temperature TC from 35 to 142 K, while ΔS the corresponding change of isothermal entropy decreases significantly. The refrigerant capacity of the Er1−xDyxCo2 compounds is discussed and our experimental data are compared with the corresponding theoretical results reported in the literature [de Oliveira, von Ranke, J. Magn. Magn. Mater. 264 (2003) 55]. |
| Databáze: | OpenAIRE |
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