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EnglishIn this paper we investigate the magnetocaloric properties of polycrystalline MnBi at its magnetostructural transition at 628 K. The samples, prepared by rapid quenching and annealing, present 86 wt% of the hexagonal MnBi phase. The entropy change at the transition is found to be Δs =17.6 Jkg-1K-1 and the magnetic field shifts the transition temperature of 2.6 KT-1. Despite the relevant magnetocaloric properties, the temperature hysteresis, of 19 K, is quite large for magnetothermal application.
Entropy change at the magnetostructural phase transition of polycrystalline MnBi / Basso, V.; Olivetti, E.; Martino, L.; Sasso, C.P.; Kuepferling, M.. - 2012-5(2012), p. 153. ((Intervento presentato al convegno Fifth IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature tenutosi a Grenoble nel 17-20 September 2012.
| Titolo: | Entropy change at the magnetostructural phase transition of polycrystalline MnBi | |
| Autori: | ||
| Data di pubblicazione: | 2012 | |
| Nome del convegno: | Fifth IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature | |
| Luogo del convegno: | Grenoble | |
| Anno del convegno: | 17-20 September 2012 | |
| Abstract: | In this paper we investigate the magnetocaloric properties of polycrystalline MnBi at its magneto...structural transition at 628 K. The samples, prepared by rapid quenching and annealing, present 86 wt% of the hexagonal MnBi phase. The entropy change at the transition is found to be Δs =17.6 Jkg-1K-1 and the magnetic field shifts the transition temperature of 2.6 KT-1. Despite the relevant magnetocaloric properties, the temperature hysteresis, of 19 K, is quite large for magnetothermal application. | |
| Full-text (pubblici): | reserved | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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