Materials evaluation reveals superior volumetric magnetocaloric effects in dense gadolinium formate frameworks, highlighting potential for improved low-temperature magnetic refrigeration.
The three-dimensional metal-organic framework Gd(HCOO)3 is characterized by a relatively compact crystal lattice of weakly interacting Gd(3+) spin centers interconnected via lightweight formate ligands, overall providing a remarkably large magnetic:non-magnetic elemental weight ratio. The resulting magnetocaloric effect per unit volume is decidedly superior in Gd(HCOO)3 than in the best known magnetic refrigerant materials for liquid-helium temperatures and low-moderate applied fields.
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Lorusso et al. (2013) studied this question.
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