Enlarging the magnetocaloric operating window of the Dy 2 NiMnO 6 double perovskite by lanthanum doping
| Autor: | S. Mansouri, Afef Kedous-Lebouc, S. Jandl, P. de Rango, Mohamed Balli, S. Khadechi-Haj Khlifa, D. Fruchart, Patrick Fournier, K. D. Truong |
|---|---|
| Přispěvatelé: | LERMA, Mohammadia School of Engineering, University Mohamed V, Rabat, Morocco, Université de Sherbrooke (UdeS), Matériaux, Rayonnements, Structure (MRS), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Micro et NanoMagnétisme (MNM), Laboratoire de Génie Electrique de Grenoble (G2ELab ), 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Acoustics and Ultrasonics 02 engineering and technology 01 natural sciences 7. Clean energy Isothermal process law.invention Condensed Matter::Materials Science law 0103 physical sciences Magnetic refrigeration Antiferromagnetism Multiferroics 010302 applied physics Magnetic moment Condensed matter physics Liquid helium Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ferromagnetism [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Condensed Matter::Strongly Correlated Electrons 0210 nano-technology |
| Zdroj: | Journal of Physics D: Applied Physics Journal of Physics D: Applied Physics, IOP Publishing, 2020, 53 (9), pp.095001. ⟨10.1088/1361-6463/ab5a01⟩ |
| ISSN: | 0022-3727 1361-6463 |
| DOI: | 10.1088/1361-6463/ab5a01⟩ |
| Popis: | International audience; In this paper, we mainly focus on the magnetic and magnetocaloric features of La2-xDyxNiMnO6 double perovskites. Their magnetocaloric properties are investigated in terms of both entropy and adiabatic temperature changes. In contrast to early works, it was found that the Dy2NiMnO6 compound unveils dominant antiferromagnetic interactions under very low magnetic fields. The ordering of its Dy 3+ magnetic moments is associated with a giant magnetocaloric effect at very low temperatures, while the established ferromagnetic Ni-O-Mn super-exchange interactions close to 100 K give rise to a moderate magnetocaloric level, only. On the other hand, the doping of Dy2NiMnO6 with high amounts of largesize rare earth elements such as La would enable us to cover an unusually wide magnetocaloric temperature range going from the liquid helium temperature up to room-temperature. More interestingly, the presence of both ordered and disordered ferromagnetic phases in La1.5Dy0.5NiMnO6 maintains constant the isothermal entropy changes over a temperature span of about 200 K, being a favorable situation from a practical point of view. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|