 Abstract control of magnetization reversal processes is important for implementing magnetic materials into technologies. Shape anisotropy and nanowires can be used to tune sharp and plane magnetic switching. Perpendicular magnetic fields make controlling these processes more difficult. Thin permilloid strips grown on single crystals of LALO3 exhibit tunable resistance changes triggered by out of plane magnetic fields. Simulations correlate these changes with magnetic domain distributions. Experimentally observed sharp magnetic switching is properly accounted for by numerical simulations when considering uniaxial substrate induced anisotropy. This research is promising for designing advanced magnetic sensors and other devices working with perpendicular magnetic fields using simple structures. This article was authored by AliExperera, Emil Forno, Sergio Martín, and others.