The manipulation of single magnetic molecules may enable new strategies for high-density
information storage and quantum-state control. However, progress in these areas depends
on developing techniques for addressing individual molecules and controlling their spin.
Here, we report success in making electrical contact to individual magnetic N@ C60
molecules and measuring spin excitations in their electron tunnelling spectra. We verify that
the molecules remain magnetic by observing a transition as a function of magnetic field that …

We report measurements of electron tunneling spectra for individual N@ C 60 molecules, a
spin-3/2 endohedral fullerene. The molecules were measured at low temperature in
electromigrated break-junctions in the single-electron transistor configuration. We observe
that the N@ C 60 devices exhibit a spin-state transition as a function of applied magnetic
field which was not observed in C 60 control devices. The nature of this transition enables us
to identify the charge and spin states of the molecule. The spectra of N@ C 60 devices also …