PD CO MULTILAYERS FOR PERPENDICULAR MAGNETIC RECORDING/

We have demonstrated that Pd/Co metal multilayers have superior perpen dicular magnetic recording properties when compared with conventional CoCr perpendicular alloy media. Using a perpendicular contact probe tr ansducer, the multilayers exhibit more than two times the readback sig nal of CoCr media. For instance, at 145,000 flux changes per inch, mul tilayer media exhibited a track amplitude of 380 mu V, compared with 1 40 mu V for conventional media using the same transducer. The multilay ers can be made with low roughness suitable for contact recording, and can generate narrow 12 microinch readback pulses with large amplitude . In addition, the multilayers have essentially no dead layer. Many as pects of Pd/Co performance can be predictably optimized for a given se t of transducer properties.