Figure 2
From: “Magnetic Force Microscopy and Energy Loss Imaging of Superparamagnetic Iron Oxide Nanoparticles”
(a), (b) expected force gradient and energy loss for an 11 nm diameter iron oxide particle, calculated for tip parameters as reported in equations 4 and 7 .
The dashed line indicates the thermal noise level in our setup. (c), (d) force gradient and energy loss correction factors γ and δ, respectively, as a function of parameter β, calculated from equations 5 and 8 , respectively. The red arrows in figures (a), (b), (c) and (d) show the expectation values for MFM signals for H = 20 nm and oscillation amplitude A0 = 85 nm (red curves in (a) and (b)), corresponding to a value of β = 0.85. The light blue squares in figures c and d indicate the common working conditions for most commercial cantilevers.
