X-ray single-crystal structure and magnetic properties of KMn(H2O)5Ru2(CO3)4·5H2O: A layered soft magnet

摘要

The temperature manipulation induces the aggregation of Ru2(CO3)4~(3-) paddle-wheel precursors and Mn~(2+) ions in lower temperature -10 °C forming layer structural complex, K[Mn(H2O)4Ru2(CO3)4]·5H2O (1). It composes of new negative layer {Mn(H2O)5Ru2(CO3)4}_n~(n-), and magnetic exchanges between spin centers result in ordering below 3.8 K. The observed critical temperature is like the previously reported 3D hetero-metallic carbonates H_(0.3)K_(0.7)Mn[Ru2(CO3)4]{H2O)_(5.5), which demonstrates that it is independent of the interlayer connecting in such heterometallic complexes based on square-grid layer {Ru2(CO3)4}_n~(3n-).