Magnetic recording media with small grain size and narrow c-axis dispersion by using dual seed layer with substrate bias

摘要

Media may be produced with narrow c-axis dispersion while having small grain size and high grain density. A dual seed layer design and a substrate bias voltage may be applied during deposition of the seed layer are used in the media. In some embodiments, the first seed layer is an amorphous material because of a high content of elements with large atomic sizes. Application of the substrate bias during deposition of the second seed layer may reduce the grain size and may narrow c-axis dispersion.

主权项

1. A recording medium comprising:
a first seed layer comprising one or more elements having atomic sizes greater than 1.35 Å that constitute between 12 to 39 at. % or between 61 to 80 at. % of the first seed layer; a second seed layer on the first seed layer; an interlayer on the second seed layer; and a region of intermixing between the first seed layer and the second seed layer, formed via application of a substrate bias voltage; wherein the second seed layer comprises an alloy of Cr, Mo, and Ni and the first seed layer and second seed layer are formed from different materials.