Study of a magnetic-cooling material Gd(OH)CO3

Abstract

The magnetocaloric effect of a coordination. polymeric material with a repeating unit of Gd(OH)CO3 has been studied experimentally using isothermal magnetization and heat capacity measurements. The maximum entropy change, -Delta S-m, reaches 66.4 J kg(-1) K-1 or 355 mJ cm(-3) K-1 for Delta H = 7 T and T = 1.8 K.

Density functional theory (DFT) calculations show weak and competing antiferromagnetic interactions between the metal centres.

Keywords

• metal-organic framework
• low-temperature
• magnetocaloric materials
• molecular magnets
• crystal-structure
• gd complexes
• clusters
• refrigeration
• coolers
• relaxation