Observation of nonlinearity and asymmetry in energies of EPR transitions of 160Gd 3+ in La(C 2H 5SO 4) 3 · 9D 2O at low magnetic fields

Abstract

The energies of EPR transitions of 160Gd 3+ in La(C 2H 5SO 4 3 · 9D 2O at 77.2 K are observed to be nonlinear functions of field at low fields. The + 3 2 , + 1 2 and − 3 2 , − 1 2 transition energies converge asymmetrically below 10 G and differ by only ≈ MHz at the lowest fields employed.