Martensitic transformation and magnetocaloric effect of rare earth-doped all-d-metal Ni37Co13Mn35Ti15-xRx (R=Er, Dy) alloy ribbons

LIU Meng; CHEN Hanxiao; WANG Zihan; SHEN Bangpo; XU Lei; ZHANG Zhishuo; HU Qiubo; MA Shengcan

doi:10.19976/j.cnki.43-1448/TF.2026003

Materials Science and Engineering of Powder Metallurgy >

2026 , Vol. 31 >Issue 3: 283 - 296

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2026003

Engineering and Technology

Martensitic transformation and magnetocaloric effect of rare earth-doped all-d-metal Ni₃₇Co₁₃Mn₃₅Ti_15-_xR_x (R=Er, Dy) alloy ribbons

LIU Meng ,
CHEN Hanxiao ,
WANG Zihan ,
SHEN Bangpo ,
XU Lei ,
ZHANG Zhishuo ,
HU Qiubo ,
MA Shengcan

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1. Jiangxi Provincial Key Laboratory of Magnetic Metallic Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology , Ganzhou 341000, China;
2. National Rare Earth Functional Material Innovation Center/Guorui Scientific Innovation Rare Earth Functional Materials Co., Ltd, Ganzhou 341000, China;
3. School of Materials Science and Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China;
4. Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471000, China

Received date: 2026-01-12

Revised date: 2026-03-07

Online published: 2026-07-03

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Abstract

Amid the dual challenges of global warming and the energy crisis, magnetic refrigeration technology has emerged as a promising solution. Utilizing the magnetocaloric effect, this technology offers advantages such as high efficiency, energy conservation, and environmental friendliness, making it a potential alternative to conventional gas compression refrigeration. Among magnetocaloric materials, Heusler-type Ni-Mn-based alloys have attracted significant attention, primarily due to their tunable magnetic phase transitions and remarkable magnetocaloric effects. In this study, Heusler alloy Ni₃₇Co₁₃Mn₃₅Ti_15-_xR_x (x=0.3, 0.5, 0.7, 1.0) ribbons were prepared via the melt-spinning method, focusing on the effects of rare-earth Er and Dy doping on the martensitic transformation behavior and magnetocaloric properties. The results indicate that the martensitic transformation temperature (T_t) of the alloys initially increases and subsequently decreases with rising rare-earth content. Specifically, it rises significantly from 190 K (0.1 T) for the undoped Ni₃₇Co₁₃Mn₃₅Ti₁₅ to above room temperature, then declining back to the vicinity of room temperature at x=1.0. Overall, the T_t of Dy-doped samples are higher than those of Er-doped samples. Ni₃₇Co₁₃Mn₃₅Ti_14.5Dy_0.5 exhibits the optimal magnetocaloric performance, its maximum magnetic entropy change is superior to that of the undoped sample, reaching 15.31 J/(kg·K) under a magnetic field change of 0-5 T. For the Ni₃₇Co₁₃Mn₃₅Ti₁₄Dy₁, the peak of the magnetic entropy change shifts rapidly towards lower temperatures with increasing magnetic field, resulting in the widest refrigeration temperature window. Furthermore, clear lath-like martensitic microstructures are observed in Ni₃₇Co₁₃Mn₃₅Ti_14.5Dy_0.5, providing important structural evidence for understanding the variations in its properties.

Key words： Heusler-type Ni-Mn-based alloy; magnetic refrigeration technology; magnetocaloric effect; Er doping; Dy doping

Cite this article

LIU Meng , CHEN Hanxiao , WANG Zihan , SHEN Bangpo , XU Lei , ZHANG Zhishuo , HU Qiubo , MA Shengcan . Martensitic transformation and magnetocaloric effect of rare earth-doped all-d-metal Ni₃₇Co₁₃Mn₃₅Ti_15-_xR_x (R=Er, Dy) alloy ribbons[J]. Materials Science and Engineering of Powder Metallurgy, 2026 , 31(3) : 283 -296 . DOI: 10.19976/j.cnki.43-1448/TF.2026003

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