抄録
TbFeCo film is fabricated on isolated FePt grains to increase the domain wall coercivity (Hw) of TbFeCo film by exchange coupling effect between TbFeCo and FePt. The transition metal (TM) moment has a dominant charge in TbFeCo film ranging from room temperature (Troom) to Curie temperature. The FePt has average grain sizes such as 29.6, 16.6 and 7.0 nm in diameter, which are perpendicularly magnetized with a high coercivty (Hc), as high as 30-45 kOe at Troom. The TbFeCo/FePt composite film shows higher Hw, Hc, and MsHw than those of the single layer of TbFeCo film. We also estimate the amountof interfacial wall energy between TbFeCo and FePt.
