GranadaUniv Chromium Lateral_Force_Microscopy KPFM Annealing Change sputter AtomicSteps Hafnia Ferrite SiliconeOxide PinpointNanomechanicalMode CuSubstrate NUS_Physics Non-ContactMode lift_mode Foil ContactMode Defects ElectrostaticForceMicroscopy STM margarine Tin sulfide Ni81Fe19 Electrode CompactDisk TappingMode Imprint SRAM temperature_control CVD AM-KPFM NCM\ neodymium_magnets Subhajjit