MAGNETIC-PROPERTIES AND STRUCTURES OF IRON PHTHALOCYANINE DOPED WITH POTASSIUM

The magnetic properties of iron phthalocyanine doped with potassium (K -FePc) were examined. K-FePc obtained at 550 degrees C for 5hr is rega rded as ferromagnetic based on the SQUID measurements. The saturation magnetization of this sample is 15.3 emuG/g at 298K. The existence of isolated iron was not able to be confirmed in the sample by means of X -ray diffraction analysis and TEM observation. In the ESR spectra, the g-value of K-FePc was in contrast to that of isolated iron. These res ults suggest that the origin of the ferromagnetism of K-FePc is not du e to isolated iron but other ferromagnetic interactions. The thermal h istory (cooling rate, post heat treatment) after the doping reaction s ignificantly influences the magnetic property.