Magnetic properties of Pr[Fe(Cn)(6)]·5H(2)O

Magnetic properties of Prussian blue analogues, the molecule-based ferrimagnet Pr[Fe(CN)(6)] - 5H(2)O, are presented. The zero-field-cooled magnetisation curves deviate from the field-cooled magnetisation measurements M(T) below certain temperature T-f = 14.5 K, and show a broad maximum at about T = 12 K. Such a behaviour of M(T) is typical for the small particles system or for non-interacting magnetic clusters. The saturation magnetic moment mu(s) = 2.02 mu(B), determined from M(1/H) curves, agrees very well with the theoretical value. The Curie temperature T-c = 14.8 K were determined from M-2(T) curves. The M(H) curve shows hysteresis behaviour at T = 4.5 K. Magnetic susceptibility chi obeys Curie-Weiss law very well above T = 30 K with mu(eff) = 3.8 mu(B) and theta= -18.6 K. The changes in shapes of low-temperature H-1-solid-echo spectra reflect the changes in the magnetic state of the sample