Double Magnet Master Media for Magnetic Printing Onto Energy-Assisted Magnetic Recording Media

The magnetic printing onto energy-assisted magnetic recording (EAMR) media by utilizing double magnet master (DMM) media has been demonstrated. The DMM media is effective for improving printing characteristics by enhancing recording field with two different magnetic patterns that consist of high coercivity and low coercivity magnets. The magnetization distributions and printing performances (PPs) for magnetic printing onto EAMR media were evaluated by the micromagnetic simulation. The DMM can clearly print the L/S and checkerboard patterns onto EAMR media, and the DMM PP was superior to that of the conventional master media. The DMM printing could write the servo-signals onto the EAMR media with the coercivity of up to 30 kOe. The narrower switching distributions of grains in EAMR media enhances the printing characteristics. The potential of magnetic printing with DMM media was revealed for writing the servo-signals onto the EAMR media.