Graphene Spintronic Devices with Molecular Nanomagnets (original) (raw)

S ingle-molecule magnets (SMMs) have been demonstrated to possess well-defined quantum states and quantum behavior at the single molecule level. The presence of a high-spin state exhibiting a magnetic anisotropy barrier leads to the observation of quantum tunneling of the magnetization (QTM). Very recently, observation of QTM by X-ray magnetic dichroism was reported for monolayers of isolated Fe 4 SMMs on a Au(111) substrate. The crossing between two molecular levels can also be studied at finite field and tuned in different crystallographic directions in the laboratory. 3 While these issues have been intensively studied in ensembles of identical molecules, the observation of the magnetization reversal on one or very-few molecules has not been reported yet.