  We review different electron transport methods to probe the magnetic
properties, such as the magnetic anisotropy, of an individual Fe4 SMM. The
different approaches comprise first and higher order transport through the
molecule. Gate spectroscopy, focusing on the charge degeneracy-point, is
presented as a robust technique to quantify the longitudinal magnetic
anisotropy of the SMM in different redox states. We provide statistics showing
the robustness and reproducibility of the different methods. In addition,
conductance measurements typically show high-energy excited states well beyond
the ground spin multiplet of SMM. Some of these excitations have their origin
in excited spin multiplets, others in vibrational modes of the molecule. The
interplay between vibrations, charge and spin may yield a new approach for spin
control.
