Electron Paramagnetic Resonance of Divalent V, Mn, and Co in Single Crystals of CdI₂ and PbI₂

Abstract

EPR spectra are reported of V2+, Mn2+, and Co2+ in CdI, and PbI, single crystals. The g-values of V2+ are strongly affected by covalent mixing of metal 3d with iodine 5p orbitals. The ligand hyperfine interaction is different for Mn substituted in CdI, and PbI,, respectively. The change is attributed to a different covalent bonding in the two lattices due to the local distortion of the MnI, octahedra. The temperature dependence of the zero-field splitting of Mnz+ is explained in terms of the anisotropy of the nuclear vibrations. Es werden EPR-Spektren von

Spectroscopic studies of 2H‐PbI2(Mn) layered crystals

“…The number of the weak lines is six; they are pronounced most clearly when θ = 90°. They are located at the same interval (72 ± 1) × 10 -4 cm -1 from one another; this value coincides with known hyperfine splitting of Mn 2+ in PbI 2 [7]. This fact shows that the considered lines belong to the |-1/2〉 ↔ |1/2〉 electron transition of a single Mn 2+ ion in the 2H-PbI 2 crystal lattice.…”