A data storage apparatus includes a magnetic medium having a top recording layer of hard magnetic material for perpendicularly storing magnetic data and a bottom underlayer of soft magnetic material, a read head for reading magnetic data from a recorded portion of the recording layer, a stabilizer for...http://www.google.de/patents/US6985322?utm_source=gb-gplus-sharePatent US6985322 - Perpendicular recording and read head assembly with in situ stand alone stabilizer for a magnetic medium underlayer
