Magnetic patterning: local manipulation of the intergranular exchange coupling via grain boundary engineering.

摘要: Magnetic patterning, with designed spatial profile of the desired magnetic properties, has been a rising challenge for developing devices at nanoscale. Most existing methods rely on locally modifying anisotropy energy or saturation magnetization, and thus post stringent constraints adaptability in diverse applications. We propose an alternative route patterning: by manipulating local intergranular exchange coupling to tune lateral properties. As demonstration, grain boundary structure Co/Pt multilayers is engineered thermal treatment, where stress state can be modified. With Ag passivation layers top multilayers, we hinder relaxation modification. Combining pre-patterned layer design variations properties tuning coupling, which diversifies patterning process extends its feasibility varieties new devices.