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EnglishTwo set of polycrystalline MnBi bulk samples, as-annealed and compacted powders, with different grain size, were prepared through powder metallurgy. Coercivity mechanisms were investigated by Kronmüller plot analysis, evaluating α and Neff parameters, which take into account the effect of microstructure. The temperature dependence of coercivity of the as-annealed sample (α= 0.31) is compatible with pinning-type mechanisms, while that of the compacted powders (α= 0.41) indicates nucleation-type processes. Irreversible effects of temperature dependence of coercivity have been investigated.
Study of the temperature dependence of coercivity in MnBi / Curcio, Carmen; Olivetti, Elena Sonia; Martino, Luca; Kuepferling, Michaela; Basso, Vittorio. - In: PHYSICS PROCEDIA. - ISSN 1875-3892. - STAMPA. - 75:(2015), pp. 1230-1237. ((Intervento presentato al convegno ICM2015 tenutosi a Barcellona (Spagna) nel 5-11/07/2015 [10.1016/j.phpro.2015.12.135].
| Titolo: | Study of the temperature dependence of coercivity in MnBi | |
| Autori: | ||
| Data di pubblicazione: | 2015 | |
| Rivista: | ||
| Abstract: | Two set of polycrystalline MnBi bulk samples, as-annealed and compacted powders, with different g...rain size, were prepared through powder metallurgy. Coercivity mechanisms were investigated by Kronmüller plot analysis, evaluating α and Neff parameters, which take into account the effect of microstructure. The temperature dependence of coercivity of the as-annealed sample (α= 0.31) is compatible with pinning-type mechanisms, while that of the compacted powders (α= 0.41) indicates nucleation-type processes. Irreversible effects of temperature dependence of coercivity have been investigated. | |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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