ΔmS=±1, ΔmI=0, ±1, ±2 Transitions in the Paramagnetic Resonance Spectrum of Mn(pic)2 · 2H2O:Zn(pic)2 · 4 H2O

Abstract

ESR spectra of manganese picolinate substituted in zinc picolinate tetrahydrate single crystals are presented. Two magnetically nonequivalent sites are found to be occupied in this matrix. Highly resolved hyperfine line groups were found in the spectra, which nearly completely exhibit the full pattern of transitions with Δm_S=±1, Δm_I=0, ±1, ±2. The spectra may be analyzed to a high degree of approximation by a spin Hamiltonian containing 8 magnetic constants for the Mn picolinate molecules. For satisfactory interpretation third order perturbation theory was found unsatisfactory but high accuracy may be achieved by exact diagonalization.