| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Current Trends in Magnetocaloric Materials: An FMD Symposium in Honor of Ekkes Brueck
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| Presentation Title |
Magnetocaloric Effect in Heusler-type Magnetic Shape Memory Materials |
| Author(s) |
Volodymyr Chernenko, Victor Līvov, Eduard Cesari, Jose Manuel Barandiaran |
| On-Site Speaker (Planned) |
Volodymyr Chernenko |
| Abstract Scope |
Giant magnetocaloric effect (MCE) is observed in the materials exhibiting magnetostructural first order transformation accompanied by a sharp change of magnetic order. The Heusler-type magnetic shape memory alloys (SMAs) represent such kind of materials. They can be tentatively divided into two groups: metamagnetic and ferromagnetic. The metamagnetic SMAs (MetaMSMAs), typically Ni-Mn-X (X=Sn, In, Sb), exhibit inverse giant MCE in the temperature range of martensitic transformation (MT). Ferromagnetic SMAs (FSMAs), prototype is Ni-Mn-Ga, show a giant conventional MCE at MT merged with Curie temperature.
Brief overview of the recent experimental results on MCE in both MetaMSMAs and FSMAs will be presented. The emphasis will be given to the results obtained by the adiabatic and heat capacity under magnetic field techniques.
The Landau theory of martensitic-type magnetostructural transformations is proposed for the quantitative description of giant MCE and heat capacity in both MetaMSMAs and FSMAs. |
| Proceedings Inclusion? |
Undecided |