Magnetic Properties of Hetrostructured Layered Thin Films Based on Prussian Blue Derivatives$^{1}$

By utilizing a sequential deposition method and controlling the chemical composition of each layer, a series of hetrostructured layered thin films of different Prussian blue derivatives were fabricated. As a starting material, a thin film of 20 cycles of sequentially deposited Rb$_{j}$Ni$_{k}$[Cr(CN)$_{6}$]$_{l}$$\cdot$$n$H$_{2}$O film was generated, and the magnetization studies showed a ferromagnetic ordering at \emph{T}$_{C}$ $\sim$ 84 K and a frequency dependent susceptibility. A similar film of Rb$_{j}$Co$_{k}$[Fe(CN)$_{6}$]$_{l}$$\cdot$$n$H$_{2}$O is known to show anisotropic photoinduced magnetism.$^{2}$ A hetrostructured film was also prepared with Rb$_{j}$Ni$_{k}$[Cr(CN)$_{6}$]$_{l}$$\cdot$$n$H$_{2}$O and Rb$_{j}$Co$_{k}$[Fe(CN)$_{6}$]$_{l}$$\cdot$$n$H$_{2}$O alternately deposited for 10 cycles. The preliminary magnetooptical study of the hetrostructured film shows the presence of magnetic interactions between the layers of the two different Prussian blue derivatives. \linebreak\linebreak $^{1}$This work was supported, in part, by the National Science Foundation DMR-0305371 (MWM) and NSF DMR-0543362 (DRT). \linebreak $^{2}$J.-H. Park, E. \v{C}i\v{z}m\'{a}r, M. W. Meisel, Y. D. Huh, F. Frye, S. Lane, and D. R. Talham, Appl. Phys. Lett. 85, 3797 (2004).