Enhanced local homogeneity obtained by induction melting for optimizing reversible magnetocaloric response in all-d-metal Ni(Co)-Mn-Ti Heusler alloys
All-d-metal Ni(Co)-Mn-Ti Heusler alloys showing giant magnetocaloric properties at near room temperature are highly desirable for solid-state cooling applications. However, when exploring the literature, the reported magnetocaloric properties vary widely, hinting at the importance of the synthesis r...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universidad de Sevilla (US) |
| Repositorio: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:dnet:idus________::5e7b307bc6bd3dba9437fd81953c85db |
| Acceso en línea: | https://hdl.handle.net/11441/183989 https://doi.org/10.1016/j.jallcom.2026.186135 |
| Access Level: | acceso abierto |
| Palabra clave: | All-d-metal Ni(Co)-Mn-Ti Heusler alloys Magnetostructural transition Magnetocaloric effect |
| Sumario: | All-d-metal Ni(Co)-Mn-Ti Heusler alloys showing giant magnetocaloric properties at near room temperature are highly desirable for solid-state cooling applications. However, when exploring the literature, the reported magnetocaloric properties vary widely, hinting at the importance of the synthesis route. In this work, we select the Ni36Co14Mn35Ti15 composition, and systematically explore different synthesis routes such as arc melting, suction casting and induction melting, to investigate their effect on the magnetostructural transition and magnetocaloric properties. Among the studied samples, the induction melted sample shows the most abrupt martensitic transformation and the lowest thermal hysteresis: 4 K versus 8 K for arc melted and 17 K for suction casted. This abruptness leads to a remarkable isothermal entropy change of 23 J kg−1 K−1 for 1.5 T, along with the largest reversible response to date of 29 J kg−1 K−1 for 5 T, as compared to the reported magnetocaloric materials undergoing magnetostructural transition. The quantitative analysis of the elemental maps for the studied alloy series reveals that the larger homogeneity in the Ti distribution achieved by induction melting, when compared to the arc melted and suction casted counterparts, should be responsible for the sharpness of phase transformation and the low thermal hysteresis observed. |
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