| Full text | |
| Author(s): |
dos Reis, Ricardo D.
[1, 2]
;
Caron, Luana
[1, 3, 4]
;
Singh, Sanjay
[1, 5]
;
Felser, Claudia
[1]
;
Nicklas, Michael
[1]
Total Authors: 5
|
| Affiliation: | [1] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden - Germany
[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas - Brazil
[3] Helmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin - Germany
[4] Bielefeld Univ, Fac Phys, POB 100131, D-33501 Bielefeld - Germany
[5] Indian Inst Technol BHU, Sch Mat Sci & Technol, Varanasi 221005, Uttar Pradesh - India
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Entropy; v. 23, n. 10 OCT 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Magnetic shape-memory materials are potential magnetic refrigerants, due the caloric properties of their magnetic-field-induced martensitic transformation. The first-order nature of the martensitic transition may be the origin of hysteresis effects that can hinder practical applications. Moreover, the presence of latent heat in these transitions requires direct methods to measure the entropy and to correctly analyze the magnetocaloric effect. Here, we investigated the magnetocaloric effect in the Heusler material Ni1.7Pt0.3MnGa by combining an indirect approach to determine the entropy change from isofield magnetization curves and direct heat-flow measurements using a Peltier calorimeter. Our results demonstrate that the magnetic entropy change \& UDelta;S in the vicinity of the first-order martensitic phase transition depends on the measuring method and is directly connected with the temperature and field history of the experimental processes.</p> (AU) | |
| FAPESP's process: | 18/00823-0 - New topological states of matter under extreme conditions |
| Grantee: | Ricardo Donizeth dos Reis |
| Support Opportunities: | Research Grants - Young Investigators Grants |