Magnetic and Transport Properties of Heterostructured Films of Prussian Blue Analogues and Manganites

The magnetic and transport properties of heterostructured films consisting of Prussian blue analogues, $A_j$M$^{\prime}_k$[M(CN)$_6$]$_{\ell}\cdot n$H$_2$O (M$^{\prime}$M-PBA), where $A$ is an alkali ion and M$^{\prime}$,M are transition metals, and manganites have been studied. Specifically, NiCr-PBA and CoFe-PBA films\footnote{D.M.~Pajerowski \emph{et al.}, J.~Am.~Chem.~Soc. {\bf 132} (2010) 4058.} of $\sim$100~nm thickness have been deposited on perovskite (La$_{1-y}$Pr$_{y}$)$_{0.67}$Ca$_{0.33}$MnO$_3$ (LPCMO) manganese films\footnote{T.~Dhakal, J.~Tosado, A.~Biswas, Phys.~Rev.~B {\bf 75} (2007) 092404.} of $\sim$30~nm thickness. The effect of the ferromagnetic NiCr-PBA, $T_c \sim 70$~K, and the photo-controllable ferrimagnetic CoFe-PBA, $T_c \sim 20$~K, on the I-V properties of the LPCMO will be reported, where special attention will be given to the changes of the transition temperatures of the ferromagnetic metallic (FMM) and the charge-ordered insulating (COI) phases in the LPCMO substrate. \\ ** Supported by NSF DMR-0701400 (MWM), DMR-0804452 (AB), DMR-1005581 (DRT), DMR-0654118 (NHMFL), and by scholarship from the Organization of American States (PAQ).