The effect of magnetic coupling on magneto-caloric behaviour in two 3D Gd(iii)–glycolate coordination polymers

Abstract

Two 3D Gd(iii)-based coordination polymers, [Gd(glc)(Hglc)(H₂O)]_n·nH₂O (1) and [Gd(Hglc)₃]_n (2) are reported. The MCE measurements indicate the weaker magnetic coupling in 2 produce a higher MCE than 1, especially at moderate fields (−ΔS_m,max = 41.1 J kg⁻¹ K⁻¹ and 24.8 J kg⁻¹ K⁻¹ for 1 and 2 respectively at ΔH = 3 T).