Tuning the Magnetic Behavior via Dehydration/Hydration Treatment of a New Ferrimagnet with the Composition of K<sub>0.2</sub>Mn<sub>1.4</sub>Cr(CN)<sub>6</sub>·6H<sub>2</sub>O
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A new complex (1) of Prussian blue analogue with the composition of K0.2Mn1.4Cr(CN)6·6H2O was prepared and characterized structurally as well as magnetically. The crystal structure of complex 1 was determined by X-ray diffraction analysis. The results indicate that complex 1 consists of a 3D cubic lattice similar to those of Mn3[Cr(CN)6]2·xH2O, Mn3[Co(CN)6]2·xH2O, Cd3[Cr(CN)6]2·xH2O, and Cd3[Co(CN)6]2·xH2O. Magnetic measurements show that complex 1 is a ferrimagnet with Tc = 66 K. It is interesting to note that the magnetic behavior of complex 1 can be substantially modulated through a dehydration/rehydration treatment. The Tc value of this ferrimagnet increases to 99 K after dehydration reaching a 23.4% weight loss, and it decreases back to 66 K after the dehydrated sample reabsorbs water molecules.
