Table-like shape magnetocaloric effect and large refrigerant capacity in dual-phase HoNi/HoNi2 composite

Dan Guo; Yikun Zhang; Yaming Wang; Jiang Wang; Zhongming Ren

doi:10.1088/1674-1056/aba9be

Journals >Chinese Physics B >Volume 29 >Issue 10 >Page > Article

Chinese Physics B
Vol. 29, Issue 10, (2020)

Table-like shape magnetocaloric effect and large refrigerant capacity in dual-phase HoNi/HoNi₂ composite

Dan Guo, Yikun Zhang^†, Yaming Wang, Jiang Wang, and Zhongming Ren

Author Affiliations

State Key Laboratory of Advanced Special Steels & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

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DOI: 10.1088/1674-1056/aba9be Cite this Article

Dan Guo, Yikun Zhang, Yaming Wang, Jiang Wang, Zhongming Ren. Table-like shape magnetocaloric effect and large refrigerant capacity in dual-phase HoNi/HoNi₂ composite[J]. Chinese Physics B, 2020, 29(10): Copy Citation Text

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The XRD pattern of HoNi/HoNi2 composite along with Rietveld refinement using FULLPROF program. Inset shows the BSE image of HoNi/HoNi2 composite.

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.

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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. 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.

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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).

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Fig. 4. The –ΔS_M–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.

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Materials	T_M/K	$- Δ S_{M}^{\max}$ /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 T_M,

- Δ S_{M}^{\max}

, 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.

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