Influence of dehydration on the electron spin resonance in the [Cu.sub.3][[W[.sub.2] x 8[H.sub.2]O molecular magnet

The influence of dehydration on the electron spin resonance spectra in the [Cu.sub.3][[W[(CN[).sub.8]].sub.2][(pyrimidine).sub.2] x 8[H.sub.2]O molecular magnet has been found. It has been established that two ferromagnetic phases with the Curie temperatures of ~12-17 and ~50 K, which correspond to two different lines of the ferromagnetic resonance, are present in crystals. Dehydration leads to increasing the Curie temperature of the low-temperature phase from 12 to 17 K and to varying the temperature dependences of the spectrum parameters of the high-temperature phase (the resonant field and the width line).