Magnetic field profiling for selected-states magnetic-resonance   spectroscopy (SSMRS) and Stern-Gerlach spectroscopy (MGRS) in condensed   matter
  A method was presented of profiling the magnetic field, with a zero vector of magnetic flux density $B_{r}$ and strong gradient G, enabling conditions for the Stern-Gerlach spectroscopy to be accomplished in condensed matter (the method has been called magnetic field gradient spectroscopy - MGRS), as well the previously proposed magnetic resonance spectroscopy for selected energy states (SSMRS). Magnetic field distribution in a model electromagnet were shown when condition $B_{r}= 0$ for resultant magnetic field was satisfied within the sample 
C. J. Lewa