Magnetic and transport properties of multilayer nanoscale antidot arrays

摘要

The magnetic and transport properties of multilayer antidot nanostructure have been systematically investigated. The structures consisting of Co (30 nm)/Cu (t_(Cu) nm)/Ni_(80)Fe_(20) (30 nm) were fabricated using deep ultraviolet lithography followed by lift-off process. We observed that the magnetization reversal processes are markedly dependent on t_(Cu) due to the interplay of different interlayer coupling mechanisms. The transport properties of the antidot arrays typically show a superposition of anisotropic and giant magnetoresistance effects, and the relative magnitude of the two effects is strongly sensitive to t_(Cu). This is completely different from the observations in the corresponding continuous films.