抄録
Temperature and magnetic field dependent magnetization studies of ferrimagnetic NBu4[FeIIFeIII(ox)3] are presented, which demonstrate that the negative magnetization phenomenon in the field-cooled mode, observed only in magnetic fields lower than 5, kOe and at temperatures below 30, K. The absolute value of the ferrimagnetic saturation magnetization is 0.07μ B, estimated from the field dependence of the field-cooled magnetization at 5, K, which is only the 7%.compensation temperature as well as a temperature dependence of compensating magnetic field are observed. The hysteresis curve at 5, K under field-cooled mode under 1, kOe magnetic field shows a negative center off-set indicating the presence of large anisotropy in the material at low temperatures. The memory of the field-cooling procedure cannot be destroyed by a magnetic field of 55, kOe.
