Magnetic properties of Pr[Fe(CN)6] · 5H2O

Magnetic properties of Prussian blue analogues, the molecule‐based ferrimagnet Pr[Fe(CN)6] · 5H2O, are presented. The zero‐field‐cooled magnetisation curves deviate from the field‐cooled magnetisation measurements M(T) below certain temperature Tf = 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 μs = 2.02 μB, determined from M(1/H) curves, agrees very well with the theoretical value. The Curie temperature Tc = 14.8 K were determined from M2(T) curves. The M(H) curve shows hysteresis behaviour at T = 4.5 K. Magnetic susceptibility χ obeys Curie–Weiss law very well above Tθ = 30 K with μeff = 3.8 μB and = –18.6 K. The changes in shapes of low‐temperature 1H‐solid‐echo spectra reflect the changes in the magnetic state of the sample.