| http://www.w3.org/ns/prov#value | - The nanoscale nonferromagnetic gap 77 is then formed of insulating material such as alumina, silicon dioxide or the like, or conductive material such as tantalum, chromium, nickel-chromium or the like, the thickness the gap 77 layer depending upon the desired spacing between the pole tip 70 and the soft magnetic underlayer 55 of the medium 50 and the desired angle of maximum flux from trailing cor
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