Continuous miniaturization of electronic components puts higher demands on the heat dissipation of the micro-systems, which requires environmental friendliness, good heat exchange capability, and high-performance micro-refrigeration materials. Here, we developed a Ni–Mn–Fe–In microwire fabricated by the Taylor–Ulitovsky method, showing ⟨001⟩A orientation close to the axial direction of microwire. Due to the large volume change ΔV/V (−1.24%), the large entropy change ΔStr of 43.6 J kg−1 K−1 was achieved in the microwire. Owing to the low driving force of the microwire with a single crystalline of ⟨001⟩A orientation close to the axial direction of microwire, large adiabatic temperature change of −5.7 K was achieved at room temperature after removing a low stress of 120 MPa. Thus, high specific adiabatic temperature change of 47.5 K/GPa was obtained in the microwire, which is the highest value among all the reported low-dimension elastocaloric materials, including thin films/foils, microwires/wires, and ribbons. The outstanding comprehensive properties give this microwire a great application potential in miniaturization and compactness of refrigeration devices.
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25 November 2024
Research Article|
November 25 2024
Large room-temperature elastocaloric effect and enhanced specific adiabatic temperature change of Ni–Mn-based shape memory microwire
Zhen Chen
;
Zhen Chen
(Formal analysis, Funding acquisition, Methodology, Writing – original draft, Writing – review & editing)
1
Xi'an Rare Metal Materials Institute Co., Ltd
., Xi'an 710000, China
2
Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
, Beijing 100083, China
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Yuxian Cao;
Yuxian Cao
(Conceptualization, Data curation, Methodology, Validation)
3
Institute for Special Steel Research, Central Iron and Steel Research Institute
, Beijing 100081, China
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Liying Sun;
Liying Sun
(Formal analysis, Investigation, Resources)
4
Institute of New Materials, Guangdong Academy of Sciences
, Guangzhou 510650, China
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Xiaoming Sun
;
Xiaoming Sun
a)
(Conceptualization, Funding acquisition, Visualization)
5
State Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences
, Beijing 100190, China
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Daoyong Cong
Daoyong Cong
a)
(Funding acquisition, Project administration, Supervision, Writing – review & editing)
2
Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
, Beijing 100083, China
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Appl. Phys. Lett. 125, 223103 (2024)
Article history
Received:
September 20 2024
Accepted:
November 10 2024
Citation
Zhen Chen, Yuxian Cao, Liying Sun, Xiaoming Sun, Daoyong Cong; Large room-temperature elastocaloric effect and enhanced specific adiabatic temperature change of Ni–Mn-based shape memory microwire. Appl. Phys. Lett. 25 November 2024; 125 (22): 223103. https://doi.org/10.1063/5.0239552
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