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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.
| Titolo: | Entropy change at the magnetostructural phase transition of polycrystalline MnBi |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Serie: | |
| Abstract: | In 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. |
| Handle: | http://hdl.handle.net/11696/32209 |
| ISBN: | 978-2-913149-96-0 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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