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|Title:||Structure and magnetic properties of copper(II) hexacyanoferrate(III) compound|
|Citation:||Ng, C.W., Ding, J., Shi, Y., Gan, L.M. (2001-04). Structure and magnetic properties of copper(II) hexacyanoferrate(III) compound. Journal of Physics and Chemistry of Solids 62 (4) : 767-775. ScholarBank@NUS Repository. https://doi.org/10.1016/S0022-3697(00)00248-1|
|Abstract:||Molecular magnet copper(II) hexacyanoferrate(III) powder, Cu1.5[Fe(CN)6]·6H2O was prepared by coprecipitation method where the particle size is in the nanoscale range. It possessed a face-centered cubic (FCC) crystal structure with lattice parameter of around 10 angstroms. This ferromagnetic powder has a Curie temperature of 19 K. The effects of annealing on its physical as well as magnetic properties were studied. The FeIII-CN-CuII structure is the major structure in the freeze-dried Fe-Cu cyanide. As the cyanide was annealed at higher temperature, two other structures appeared, namely FeII-CN-CuIII and CuII-CN-FeIII as probed by Fourier-transform infrared (FTIR) and Moessbauer techniques. After annealing at 140 °C, FeIII-CN-CuII structure disappeared while FeII-CN-CuIII structure appeared to be the dominant structure. Complete decomposition of the cyanide phase occurred at around 370 °C, whereby nanoscale Fe-Cu particles were found, as well as significant amount of amorphous carbon particles. These soft magnetic Fe-Cu particles have Ms value of 32 emu/g and coercivity of 0.5 kOe.|
|Source Title:||Journal of Physics and Chemistry of Solids|
|Appears in Collections:||Staff Publications|
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