真空蒸着法によるMn_mFe_1-m系薄膜の構造と磁性に対するBiの効果

抄録

We have studied the structure and magnetic properties of the films obtained by vacuum evaporation method from the evaporant (Mn_mFe_1-m) _100-xBi_x. When m=0.25 and 3 ≤ x < 4 at%, the films crystallized in Mn-ferrite phase which consisted of the piller-shaped grains with a pretty ordered structure. They have shown large perpendicular-magnetic-anisotropy. The saturation magnetization and coercive force were 1.5×10³ (G) and 550 (Oe), respectively. It was revealed by AES analysis that Bi played an important role in the formation of the piller-shaped grains of Mn-ferrite, which was closely correlative with perpendicular-magnetic-anisotropy.