Table-like shape magnetocaloric effect and large refrigerant capacity in dual-phase HoNi/HoNi2 composite
Dan Guo(郭丹), Yikun Zhang(张义坤)†, Yaming Wang(王雅鸣), Jiang Wang(王江), and Zhongming Ren(任忠鸣)‡
1State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
Nowadays, magnetic cooling (MC) technology by using the magnetocaloric effect (MCE) has attracted extensive research interest for its promising practical applications. A constant large/giant MCE covers wide refrigeration temperatures (denote as table-like shape) is beneficial for obtaining high efficiency performance for MC. In this paper, the HoNi/HoNi2 composite was successfully synthesized by arc-melting method and proved to be composed of HoNi and HoNi2 crystalline phases with weight ratios of 52.4 wt.% and 47.6 wt.%, respectively. The maximum magnetic entropy change ( ) is 18.23 J/(kg⋅K), and the refrigerant capacity values RC1, RC2, and RC3 are 867.9 J/kg, 676.4 J/kg, and 467.8 J/kg with ΔH = 0–70 kOe, respectively. The table-like shape MCE and large refrigerant capacity values make the composite attractive for cryogenic MC using the Ericsson cycle.
* Project supported by the National Natural Science Foundation of China (Grant No. 51690162), Science and Technology Committee of Shanghai, China (Grant No. 19ZR1418300), Independent Research and Development Project of State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University (Grant No. SKLASS 2019-Z003), and the Science and Technology Commission of Shanghai Municipality, China (Grant No. 19DZ2270200).
Cite this article:
Dan Guo(郭丹), Yikun Zhang(张义坤)†, Yaming Wang(王雅鸣), Jiang Wang(王江), and Zhongming Ren(任忠鸣)‡ Table-like shape magnetocaloric effect and large refrigerant capacity in dual-phase HoNi/HoNi2 composite 2020 Chin. Phys. B 29 107502
Fig. 1.
The XRD pattern of HoNi/HoNi2 composite along with Rietveld refinement using FULLPROF program. Inset shows the BSE image of HoNi/HoNi2 composite.
Fig. 2.
The T dependence of M (left-scale) and 1/χ (H/M, right-scale) at H = 10 kOe for HoNi/HoNi2 composite. The inset illustrates M–T curves measured at H = 2 kOe in ZFC and FC modes as well as d M/d T–T curve for HoNi/HoNi2 composite.
Fig. 3.
(a) The M–H curves under H up to 70 kOe for HoNi/HoNi2 composite. (b) The corresponding Arrott-plots (M2 vs. H/M).
Fig. 4.
The –ΔSM–T curves at different ΔH for HoNi/HoNi2 composite compound. Inset illustrates the RC1, RC2, and RC3 values at different ΔH for HoNi/HoNi2 composite.
Materials
TM/K
/J⋅kg−1⋅K−1
RC1/J⋅kg−1
Ref.
HoNi/HoNi2
13/16/38.5
14.93
623.5
this work
HoNi
13.5/35.5
16.6
∼691
[26]
ErGa
15/30
21.3
∼658
[17]
0.4(DyNi2) + 0.6(TbNi2)
21.5/37
12.9
526
[18]
HoPdIn
6/23
14.6
496
[20]
ErZn2/ErZn
9/20
19.5
447
[23]
GdCo2B2C
17.2
10.34
238.1
[30]
Ho3Pd2
9.6
18.6
230
[31]
Gd2NiSi3
16
13
233
[32]
Tm2Cu2In
39.4
14.4
331
[33]
Ho2Co2Ga
38.5
11.7
271
[34]
Dy11Co4In9
37
3.53
128.4
[35]
Table 1.
The TM, , and RC1 for HoNi/HoNi2 composite and recently reported table-like MCE materials, as well as some other MR materials under the field change of 0–50 kOe.
[1]
Franco V, Blázquaz J S, Ipus J J, Law J Y, Moreno-Ramíreza L M, Conde A 2018 Prog. Mater. Sci. 93 112 DOI: 10.1016/j.pmatsci.2017.10.005
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