Magnetic cryocooling with Gd3+ centers in a light and compact framework

Abstract

The magnetocaloric effect of gadolinium formate, Gd(OOCH)3, is experimentally determined down to sub-Kelvin temperatures by direct and indirect methods. This 3D metal-organic framework material is characterized by a relatively compact crystal lattice of weakly interacting Gd3+ spin centers interconnected via light formate ligands, overall providing a remarkably large magnetic:non-magnetic elemental weight ratio. The resulting volumetric magnetic entropy change is decidedly superior in Gd(OOCH)3 than in the best known magnetic refrigerant materials for liquid-helium temperatures and low-moderate applied fields.

11 pages, 4 figures

References in corpus (6)

• Magnetothermal properties of molecule-based materials
• Spin-enhanced magnetocaloric effect in molecular nanomagnets
• Giant and time-dependent magnetocaloric effect in high-spin molecular magnets
• Magnetocaloric effect in hexacyanochromate Prussian blue analogs
• Surface-confined molecular coolers for cryogenics
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• Giant magnetocaloric effect in exchange-frustrated GdCrTiO5 antiferromagnet
• Magnetocaloric properties of $R_3$Ga${}_5$O${}_{12}$ ($R$ = Tb,Gd,Nd,Dy)
• Magnetic ordered structure dependence of magnetic refrigeration efficiency
• One-dimensional magnetic order in the metal-organic framework Tb(HCOO)3
• Cs2NaAl1-xCrxF6: A family of compounds presenting magnetocaloric effect