A large cryogenic magnetocaloric effect exhibited at low field by a 3D ferromagnetically coupled Mn(II)-Gd(III) framework material

Fu-Sheng Guo; Yan-Cong Chen; Jun-Liang Liu; Ji-Dong Leng; Zhao-Sha Meng; Peter Vrábel; Martin Orendáč; Ming-Liang Tong

doi:10.1039/c2cc37510a

A large cryogenic magnetocaloric effect exhibited at low field by a 3D ferromagnetically coupled Mn(II)-Gd(III) framework material

Chem Commun (Camb). 2012 Dec 28;48(100):12219-21. doi: 10.1039/c2cc37510a.

Authors

Fu-Sheng Guo¹, Yan-Cong Chen, Jun-Liang Liu, Ji-Dong Leng, Zhao-Sha Meng, Peter Vrábel, Martin Orendáč, Ming-Liang Tong

Affiliation

¹ MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.

PMID: 23147086
DOI: 10.1039/c2cc37510a

Abstract

The large cryogenic magnetocaloric effect of a 3D oxydiacetate-bridged gadolinium-manganese MOF material, [Mn(H(2)O)(6)][MnGd(oda)(3)](2)·6H(2)O (1), was evaluated by magnetization and heat capacity measurements. A maximum -ΔS(m) of 50.1 J kg(-1) K(-1) for ΔH = 70 kG along with significant entropy change at lower field was found on account of the weak Mn···Gd ferromagnetic interactions and the small molecular mass. This suggests that 1 could be considered as a potential coolant for liquid helium temperature applications.