Is it possible to measure the magnitude of the magnetic field of a single electron due to its spin? The electron's intrinsic magnetic field is not dependent upon the amount of energy it has does it? Does this require a SQUID, a Superconducting Quantum Interference Device? What published papers or experiments have been done to answer this question?
The following publication measures single electrons:
Researchers at the Delft University of Technology's Kavli Institute of Nanoscience and the Foundation for Fundamental Research on Matter (FOM) have succeeded in controlling the spin of a single electron merely by using electric fields. This clears the way for a much simpler realization of the building blocks of a (future) super-fast quantum computer.
I suppose they have taken as given the value of the electron magnetic field, but the apparatus could be used to measure it, I am sure.