Recording processes in perpendicular patterned media using longitudinal magnetic recording heads

Experimental study of the recording processes in patterned magnetic media i s presented. The reading of patterned media using spin-valve elements is co mpared to the signal levels from magneto-resistive sensors. Writing and rea ding of patterned columnar media at high areal densities is demonstrated. A new experimental technique has been developed that allows precise determin ation of the location of the write gap poles with respect to the patterned media column during the write process. Implications for patterned media wri te synchronization and the write head field requirements are discussed.