Seminars and workshops of department 26

The smallest classical storage unit is a single atom bit. Its recent discovery in form of magnetically bistable holmium single atom magnets on MgO exemplified how miniaturization could be realized down to fundamental limits1 . Here we discuss the experiments leading to the observation of magnetic remanence1 , the reading and writing of single atom magnets 2 , and the investigation of their thermal and magnetic stability3 . Using STM enabled electron spin resonance4,5 , we find a magnetic moment of (10.1±0.1) Bohr magnetons and we prove the magnetic origin of the tunneling bias voltage...