SINGLE-CRYSTALS OF CUBIC FERRITE CONTAINING ONLY FE3+ AS MAGNETIC IONS

Single crystals of LiFe5O8 and Y3Fe5O12 are of considerable interest f or microwave applications. These were grown by spontaneous crystalliza tion from fluxed melts by slow cooling. The quality of the obtained cr ystals were analyzed by X-ray diffraction and by measuring of the char acteristic parameters (saturation magnetization sigma(s), Curie temper ature T-C, density D, hardness H-V). Although the both ferrites involv e Fe3+ as the only magnetic ions which are responsible for the magneti c properties of these ferrites, several essential differences are foun d attributing to the particularity of their crystalline structure.