The present thesis deals with a part of the technically important group of the ferrites, the so far less investigated system MnFe2O4 - CoFe2O4 and was studied by various methods. The investigation of their different crystal- and magnetic- structures in respect of their magnetic and electric properties was essential.
The variuos methods used are neutron-diffraction, Mössbauer-spectroscopy, SQUID and impedance-spectroscopy.
