Magnetic Relaxation and Magnetic Moment of Mn12‐acetate Film Material

Mn12‐acetate film material was made by evaporating a diluted solution of Mn12‐acetate powder in acetonitrile. Relaxation of the magnetization was measured at low temperature on the Mn12‐acetate film material, and slow relaxation was observed up to 5.5 K. A reduced magnetic moment of the film material was observed by applying a high magnetic field. These facts indicate an increased blocking temperature (TB) of the film material with reduced magnetic moments compared with the as‐produced Mn12‐acetate.