  We consider the electron transport in single molecule magnet transistors in
the presence of Zeeman spin splitting and magnetic quantum coherence (MQC). The
Zeeman interaction is extended along the leads, thereby producing gaps in the
energy spectrum which allow electron transport with spin polarized along a
certain direction. The MQC induces an effective coupling between localized spin
states and continuum spin states in the single molecule magnet and leads,
respectively. We investigate the conductance at zero temperature as a function
of the applied bias and magnetic field, and show that the MQC is responsible
for the appearence of resonances. Accordingly, we name them MQC resonances.
