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EnglishMnBi is a magnetic material with many peculiar properties, interesting for different applications such as rare-earth-free permanent magnets and magnetic refrigeration. In this work the entropy change and the transformation kinetics of the magneto-structural transition are investigated, for two sets of samples with different grain size (“as-annealed” and “compacted pwd”). Both sets show a logarithm dependence on the temperature scan rate of the transition temperature upon cooling. This suggests that thermal activation effects are present. The estimated activation volume v0 of the magneto-structural transition corresponds to around 120 atoms.
Magnetocaloric Properties of MnBi Compound as a Function of Grain Size / Curcio, Carmen; Olivetti, Elena S.; Martino, Luca; Kuepferling, Michaela; Basso, Vittorio. - 257(2016), pp. 143-146. ((Intervento presentato al convegno International Conference on Solid Compounds of Transition Elements tenutosi a Zaragoza nel 11-15 Aprile 2016.
| Titolo: | Magnetocaloric Properties of MnBi Compound as a Function of Grain Size | |
| Autori: | ||
| Data di pubblicazione: | 2016 | |
| Nome del convegno: | International Conference on Solid Compounds of Transition Elements | |
| Luogo del convegno: | Zaragoza | |
| Anno del convegno: | 11-15 Aprile 2016 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.4028/www.scientific.net/SSP.257.143 | |
| Abstract: | MnBi is a magnetic material with many peculiar properties, interesting for different a...pplications such as rare-earth-free permanent magnets and magnetic refrigeration. In this work the entropy change and the transformation kinetics of the magneto-structural transition are investigated, for two sets of samples with different grain size (“as-annealed” and “compacted pwd”). Both sets show a logarithm dependence on the temperature scan rate of the transition temperature upon cooling. This suggests that thermal activation effects are present. The estimated activation volume v0 of the magneto-structural transition corresponds to around 120 atoms. | |
| Full-text (pubblici): | restricted | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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