Magnetocaloric Effect of Two Gd-Based Frameworks

Magnetic refrigeration material is the key to adiabatic demagnetization technology. In this work, two magnetic refrigerants, Gd5(C4O4)(HCOO)3(CO3)2(OH)6·2.5H2O (1) and Gd2(OH)4SO4 (2), were prepared through hydrothermal reaction. study reveals that their entropy changes are 24.8 J kg−1 K−1 for 1 15.1 2 at K T, respectively. The of T = ∆H exceed most gadolinium hydroxyl compounds, indicating refrigerants with large low fields can be obtained by introducing more weak exchange ligands replace groups in compounds.