Abstract :
Magnetic thin films of Mn-ferrite (MnFe2O4) have shown a large perpendicular magnetic anisotropy by the evaporation method. The evaporation substances are the (A¿Bß)100¿xCx system, where A, B, and C represent the matrix elements of combination for Mn, Fe, and Bi, respectively. For (Mn25Fe75)97Bi3, column-shaped MnFe2O4 grains deposited on a substrate have an anisotropy constant of 4.4 × 105 erg/cm3, 4¿Ms of 1.6 × 103 G, and Hc of 540 Oe. The structure and magnetic properties of such evaporated films are closely related. It was recognized that in order to obtain magnetic thin films with perpendicular anisotropy, it is important to form a first Bi-phase layer with ≪102≫ orientation on the substrate.
