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(Color online) Temperature dependence of −ΔSM at 2 T for the Eu8Ga16Ge30 type-VIII clathrate, the Eu8Ga16Ge30 type-I clathrate, and EuO.
(Color online) Temperature dependence of −ΔSM at different fields up to 6 T (a) for the 40%-60% Eu8Ga16Ge30 type-I clathrate-EuO composite and (b) for the 40%-60% and 70%-30% composites.
(Color online) (a) RC and δTFWHM for Eu8Ga16Ge30-EuO composites as a function of the weight percent of the constituents; (b) RC values of the 40%-60% Eu8Ga16Ge30-EuO composite and other magnetocaloric candidate materials, including Tb3Co and TbCoAl (Ref. 17), GdCo2B2 (Ref. 18), GdPd2Si (Ref. 19), TbCoC2 (Ref. 20), ErCo2 and ErCo1.9Si0.1 (Ref. 21), DyCuAl (Ref. 22), DyAl2 (Ref. 23), Er0.65Tb0.35Al2 and Er0.25Tb0.75Al2 (Ref. 24), ErCo1.9Fe0.1 (Ref. 25), GaNi2 (Ref. 26), Ho5Si4 (Ref. 27), and Er6MnBi2 (Ref. 28).
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