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ESR of Cu2+doped cadmium (II) formate dihydrate

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
65
Issue
5
Identifiers
DOI: 10.1016/j.jpcs.2003.10.065
Keywords
  • A. Organometallic Compounds
  • B. Crystal Growth
  • D. Crystal Field
  • D. Electron Paramagnetic Resonance
  • D. Optical Properties

Abstract

Abstract Electron spin resonance (ESR) of Cu 2+ doped cadmium formate dihydrate single crystal was studied at room temperature. Copper enters the lattice substitutionally and is trapped at two magnetically inequivalent sites. The observed spectra are fitted to a spin-Hamiltonian of rhombic symmetry with the following values of the spin-Hamiltonian parameters, Cu 2+(I): g x =2.097±0.002, g y =2.1166±0.002, g z =2.2887±0.002 and A x =(140±2)×10 −4 cm −1, A y =(151±2)×10 −4 cm −1, A z =(239±2)×10 −4 cm −1, Cu 2+(II): g x =2.0843±0.002, g y =2.1045±0.002, g z =2.2742±0.002 and A x =(141±2)×10 −4 cm −1, A y =(158±2)×10 −4 cm −1, A z =(267±2)×10 −4 cm −1. The ground state wave function of the Cu 2+ ion in this lattice is evaluated. It is found that the ground state is predominantly | x 2− y 2〉. The g-factor anisotropy is also calculated and compared with the experimental value. With the help of the optical absorption study, the nature of bonding in the complex has been discussed.

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