Effect of the heat treatment on the microstructure, magnetism and magnetocaloric effect in Fe-rich (Mn,Fe)_y(P,Si) melt-spun ribbons

Effect of the heat treatment on the microstructure, magnetism and magnetocaloric effect in Fe-rich (Mn,Fe)_y(P,Si) melt-spun ribbons

Kiecana, A. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Kwakernaak, C. (TU Delft Team Maria Santofimia Navarro)
van Dijk, N.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Brück, E.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)

2023

The effect of the heat treatment on the magnetism, magnetocaloric effect and microstructure formation has been systematically studied in Fe-rich (Mn,Fe)_y(P,Si) melt-spun ribbons (1.80 ≤ y ≤ 2.00). XRD, SEM and EDS measurements demonstrate that a metal deficiency prompts the stable (Mn,Fe)Si phase, whereas in the metal-rich region the (Mn,Fe)₃Si phase is formed. It is found that the annealing temperature influences the composition and lattice parameters of the (Mn,Fe)_y(P,Si) alloys, which greatly affects the Curie temperature (T_C). For the optimal metal/non-metal ratio y the magnetic entropy change (|ΔS_m|) is found to increase from 5.5 to 15.0 Jkg⁻¹K⁻¹ in a magnetic field change of 2 T by varying the annealing temperature from 1313 to 1433 K, indicating an enhancement of the first-order magnetic transition (FOMT). The presented results reveal that the secondary phase and magnetic properties in the (Mn,Fe)_y(P,Si) system can be tuned by varying the annealing temperature and by adjusting the metal/non-metal ratio y.

(Mn,Fe)(P,Si)
Magnetic properties
Magnetocaloric materials

http://resolver.tudelft.nl/uuid:739c9b48-2fd6-41f8-abf9-e5eee96daf26

https://doi.org/10.1016/j.jallcom.2022.167635

0925-8388

Journal of Alloys and Compounds, 932

Institutional Repository

journal article

© 2023 A. Kiecana, C. Kwakernaak, N.H. van Dijk, E.H. Brück