title: A large cryogenic magnetocaloric effect exhibited at low field by a 3D ferromagnetically coupled Mn(II)-Gd(III) framework material.
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.
authors.affiliation: 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.
authors.forename: Fu-Sheng
authors.initials: FS
authors.lastname: Guo
authors.forename: Yan-Cong
authors.initials: YC
authors.lastname: Chen
authors.forename: Jun-Liang
authors.initials: JL
authors.lastname: Liu
authors.forename: Ji-Dong
authors.initials: JD
authors.lastname: Leng
authors.forename: Zhao-Sha
authors.initials: ZS
authors.lastname: Meng
authors.forename: Peter
authors.initials: P
authors.lastname: Vrábel
authors.forename: Martin
authors.initials: M
authors.lastname: Orendáč
authors.forename: Ming-Liang
authors.initials: ML
authors.lastname: Tong