Influence of γ Phase on the Magnetostructural Transition and Magnetocaloric Properties of Ni₃₈Co₁₂Mn₄₁Sn₉ Melt-Spun Ribbons

Authors

F. Chen, Harbin Engineering University
J. L. Sánchez Llamazares, Instituto Potosino de Investigación Científica y Tecnológica A.C.
C. F. Sánchez-Valdés, Universidad de Oviedo
P. Müllner, Boise State University
Y. X. Tong, Harbin Engineering University
L. Li, Harbin Engineering University

Document Type

Article

Publication Date

8-1-2023

Abstract

In the present work, Ni₃₈Co₁₂Mn₄₁Sn₉ melt-spun ribbons were annealed under different conditions to make samples free of secondary γ phase precipitates or get them with various average grain sizes. A comparative study was carried out to demonstrate how γ phase formation affects the martensitic transformation (MT) and the magnetocaloric properties linked to the first-order phase transition. The γ phase significantly reduces the structural transformation temperatures, while slightly increases the thermal hysteresis. The γ phase also decreases the maximum entropy change (|ΔS|^max) and the effect is more significant for smaller γ phase precipitates. As compared with those with coarse γ phase grains, the ribbons containing smaller ones possess a lower |ΔS|^max but a smaller maximum magnetic hysteresis loss.

Publication Information

Chen, F.; Sánchez Llamazares, J.L.; Sánchez-Valdés, C.F.; Müllner, P.; Tong, Y.X.; and Li, L. (2023). "Influence of γ Phase on the Magnetostructural Transition and Magnetocaloric Properties of Ni₃₈Co₁₂Mn₄₁Sn₉ Melt-Spun Ribbons". Journal of Magnetism and Magnetic Materials, 579, 170900. https://doi.org/10.1016/j.jmmm.2023.170900