Table 3 Experimental data characterizing the adiabatic temperature change, ΔTad, due to MCE caused by the magnetic field change, µ0ΔH, for the selected binary RNi2 intermetallic compounds and for Ho0.75Er0.25Ni2 and Ho0.5Er0.5Ni2 solid solutions. A is the coefficient from equation ΔTad = A(µ0ΔH)2/3. The data were obtained by direct measurements of ΔTad during the field change, µ0ΔH, achieved by using the extraction method in a Bitter magnet. The values of ΔTad marked with ‡ symbol are estimated by the extrapolation of the ΔTad = A(µ0ΔH)2/3 relation.

From: Magnetocaloric performance of the three-component Ho1-xErxNi2 (x = 0.25, 0.5, 0.75) Laves phases as composite refrigerants

Compound

TC (K)

ΔTad (K)

A (K/T2/3)

0–1 T

0–2 T

0–5 T

0–8 T

0–10 T

0–14 T

TbNi237

37.1

1.5‡

2.4

4.6

6.2

6.9

8.4‡

1.45

DyNi237

21.8

2.3

3.6

7.1

9.2

10.6

13.4‡

2.31

HoNi220

13.5

2.8‡

4.2

8.7

11.4

12.9

16.3‡

2.8

Ho0.75Er0.25Ni2

12.0

2.9

5.1

9.6

12.7

13.9

16.3

2.9

Ho0.5Er0.5Ni2

9.7

2.6

4.5

8.3

11.2

12.9

15.1

2.6

ErNi220

6.2

2.1‡

3.5

6.2

8.8

9.8

12.2‡

2.1

  1. The characteristic temperatures were calculated to an accuracy of ± 0.1 K.
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