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Phase transition and magnetocaloric properties of Mn 50 Ni 42- x Co x Sn 8 (0 ≤ x ≤ 10) melt-spun ribbons

Phase transition and magnetocaloric properties of Mn 50 Ni 42- x Co x Sn 8 (0 ≤ x ≤ 10) melt-spun ribbons

Zongbin Li, Yiwen Jiang, Zhenzhuang Li, César Fidel Sánchez Valdés, José Luis Sánchez Llamazares, Bo Yang, Yudong Zhang, Claude Esling, Xiang Zhao, Liang Zuo

IUCrJ. 2018 Jan 1;5(Pt 1):54-66.

PMID: 29354271

Abstract:

The characteristics of magnetostructural coupling play a crucial role in the magnetic field-driven behaviour of magnetofunctional alloys. The availability of magnetostructural coupling over a broad temperature range is of great significance for scientific and technological purposes. This work demonstrates that strong magnetostrucural coupling can be achieved over a wide temperature range (222 to 355 K) in Co-doped high Mn-content Mn50Ni42-x Co x Sn8 (0 ≤ x ≤ 10) melt-spun ribbons. It is shown that, over a wide composition range with Co content from 3 to 9 at.%, the paramagnetic austenite first transforms into ferromagnetic austenite at TC on cooling, then the ferromagnetic austenite further transforms into a weakly magnetic martensite at TM. Such strong magnetostructural coupling enables the ribbons to exhibit field-induced inverse martensitic transformation behaviour and a large magnetocaloric effect. Under a field change of 5 T, a maximum magnetic entropy change ΔSM of 18.6 J kg-1 K-1 and an effective refrigerant capacity RCeff of up to 178 J kg-1 can be achieved, which are comparable with or even superior to those of Ni-rich Ni-Mn-based polycrystalline bulk alloys. The combination of high performance and low cost makes Mn-Ni-Co-Sn ribbons of great interest as potential candidates for magnetic refrigeration.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1884640996	NI-42		1884640-99-6	Price

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