The influence of magnetic environment on electron spin-echo decay

The use of electron spin-echo decay as a means of sensing the magnetic environment of a paramagnetic ion is suggested by the sensitivity of echo decay to small changes in the magnetic environment. Echo decay in hydrated and deuterated lanthanum magnesium double nitrate (LMN) doped with Mn²⁺or Cu²⁺was either Lorantzian (\alphae^{-m\tau^{2}}) or Gaussian (\alphae^{-2k\tau^{3}/3, where τ is the two pulse separation).