TY - JOUR
T1 - Influence of γ Phase on the Magnetostructural Transition and Magnetocaloric Properties of Ni38Co12Mn41Sn9 Melt-Spun Ribbons
AU - Chen, F.
AU - Sánchez Llamazares, J. L.
AU - Sánchez-Valdés, C. F.
AU - Müllner, P.
AU - Tong, Y. X.
AU - Li, L.
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/8/1
Y1 - 2023/8/1
N2 - 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.
AB - 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.
KW - Effect of thermal annealing
KW - Entropy change
KW - First-order magnetostructural transition
KW - Ni-Co-Mn-Sn melt spun ribbons
KW - Secondary gamma phase
UR - http://www.scopus.com/inward/record.url?scp=85161485114&partnerID=8YFLogxK
UR - https://scholarworks.boisestate.edu/mse_facpubs/580
U2 - 10.1016/j.jmmm.2023.170900
DO - 10.1016/j.jmmm.2023.170900
M3 - Article
SN - 0304-8853
VL - 579
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 170900
ER -