Abstract
We prepared a Sm-Co/Cr film using substrate heating and studied the effect of the Cr underlayer structure on the magnetic properties of the films. The coercivity depends on the relative intensity of the diffraction line from the Cr(200) plane and increases with relative intensity. When the Cr underlayer was prepared under optimized conditions, the coercivity of the film was about 3.4 kOe, even though the Sm-Co layer was as thin as 2.5 nm. We found that substrate heating during deposition was effective in preparing higher-coercivity films with an ultra-thin Sm-Co layer.
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