Method of realization of magnetic nanostructure with improved dynamic performance for high speed read heads, uses irradiation or ion implantation to create region in nanostructure with different magnetic properties to its surroundings

摘要

The magnetic nanostructure (6) induces different magnetic properties in adjacent parts (7,8) of the structure. A zone with an easy axis of magnetization, and/or a different magnetization fluctuation dissipation parameter, is created in the central zone (7) surrounded by a peripheral zone (8). The different magnetic properties are created by irradiation or ion implantation.