A magnetic recording medium is provided with an exchange layer structure, and a magnetic layer provided on the exchange layer structure. In one embodiment, the transmitter includes an input padding module configured to provide padded bits having padding bits added to payload bits for one or more control channels, and a scrambling module configured to apply a masking sequence to one or more of the padded bits to generate scrambled bits. The conductive layer and the HfO2 layer are patterned into the gate structure. A pair of terminals extends into the housing to a pair of leads for the stator coil to energize the stator coil and generate a magnetic field for actuating the fuel injector armature.