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Large low field magnetocaloric effect in multicomponent Laves phase intermetallic compounds Gd<sub>0.33</sub>Dy<sub>0.33</sub>Ho<sub>0.33</sub>Al<sub>2</sub>, Tb<sub>0.33</sub>Ho<sub>0.33</sub>Er<sub>0.33</sub>Al<sub>2</sub> and Dy<sub>0.33</sub>Ho<sub>0.33</sub>Er<sub>0.33</sub>Al<sub>2</sub>
Date Issued
01-01-2023
Author(s)
Abstract
Multicomponent Laves phase intermetallic compounds Gd<sub>0.33</sub>Dy<sub>0.33</sub>Ho<sub>0.33</sub>Al<sub>2</sub>, Tb<sub>0.33</sub>Ho<sub>0.33</sub>Er<sub>0.33</sub>Al<sub>2</sub> and Dy<sub>0.33</sub>Ho<sub>0.33</sub>Er<sub>0.33</sub>Al<sub>2</sub> have been synthesized by arc-melting. The samples crystallize in cubic (MgCu<sub>2</sub>-type, Space group Fd-3m) structure. Temperature dependent magnetization measurements reveal ferromagnetic order in the Gd<sub>0.33</sub>Dy<sub>0.33</sub>Ho<sub>0.33</sub>Al<sub>2</sub>, Tb<sub>0.33</sub>Ho<sub>0.33</sub>Er<sub>0.33</sub>Al<sub>2</sub> and Dy<sub>0.33</sub>Ho<sub>0.33</sub>Er<sub>0.33</sub>Al<sub>2</sub> compounds at 84 K, 45 K and 33 K (T<sub>C</sub>) respectively. Magnetization vs magnetic field data at 5 K suggest soft ferromagnetism. Magnetocaloric effect is estimated in terms of isothermal magnetic entropy change and adiabatic temperature change in magnetic fields up to 15 kOe and it is quite large. Therefore, these multicomponent Laves phase compounds could be useful for realizing magnetic refrigeration-based hydrogen liquefaction.