Vincent Jacques (Laboratoire de Photonique Quantique et Moléculaire, ENS Cachan Laboratoire Aimé Cotton, Orsay) - Jeudi 12 décembre.
The ability to map magnetic field distributions with high sensitivity and nanoscale resolution is of crucial importance for fundamental studies ranging from material science to biology, as well as for the development of new applications in spintronics and quantum technology. In that context, we follow a recently proposed approach to magnetic sensing based on optically detected electron spin resonance (ESR). It was shown that this method applied to a single nitrogen-vacancy (NV) defect in diamond could provide an unprecedented combination of spatial resolution and magnetic sensitivity under ambient conditions. In this talk, I will show how scanning-NV magnetometry can be used as a powerful tool for fundamental studies in nanomagnetism, focusing on domain wall structure in ultrathin ferromagnetic wires. Applications in the field of quantum information processing and biology will also be discussed.
You can also watch this video on the multimedia site ENS :savoirs.ens.fr