We describe the effects of Ti{sub}xZr{sub}(1-x) underlayers on the microstructural and magnetic properties of CoCrPtB layers. We found that as the Zr atomic composition increases in the Ti{sub}xZr{sub}(1-x) underlayers, the unit cells of the Ti{sub}xZr{sub}(1-x) underlayers expand. The Ti{sub}xZr{sub}(1-x) (0002) texture is strongest as the Zr atomic composition ranges from 40 to 60. In addition, the CoCrPtB (0002) texture induced by the (0002) textured Ti{sub}xZr{sub}(1-x) underlayer is enhanced at these optimizing Zr compositions. The grain size of the CoCrPtB layers deposited onto the Ti{sub}xZr{sub}(1-x) underlayers is around 7.5-9.5 nm. Stacking fault streaks observed by transmission electron microscopy indicate that stacking faults exist in the CoCrPtB films with the Ti{sub}xZr{sub}(1-x) underlayers. The He (coercivity) and S (squareness) of the CoCrPtB magnetic layers deposited onto the pure Ti and Zr underlayer were higher than those with the TiZr alloy underlayers.
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