A novel cyano-bridged heteronuclear complex [Sm(DMF)4(H2O)2Mn(CN)6·H2O]n has been synthesized based on the reaction of K3Mn(CN)6, Sm(NO3)3·6H2O and N,N-dimethylformamide (DMF). The crystal structure shows that title complex is a one-dimensional chain complex with two cis-CN bridging ligands between Sm atom and Mn atom. The measurement of magnetic property evidences an antiferromagnetic interaction between Sm and Mn atom. It is very interesting that title complex exhibits unusual magnetic properties, such as long-range magnetic ordering, critical temperature Tc = 18 K and stronger coercive force Hc = 600 Oe.
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