Eur. Phys. J. D 42, 35-39 (2007)
https://doi.org/10.1140/epjd/e2006-00266-0

Study of optical absorption and EPR spectra of Mn²⁺ ion in cadmium maleate dihydrate

¹ Institute of Atomic and Molecular Physics, Sichuan University, 610065, Chengdu, P.R. China
² International Centre for Materials Physics, Chinese Academy of Science, 110016, Shengyang, P.R. China

Received: 24 June 2006
Revised: 11 October 2006
Published online: 13 December 2006

Abstract

The optical absorption and EPR spectra of Mn²⁺ ion doped in cadmium maleate dihydrate have been theoretically investigated by diagonalizing the complete energy matrices for a d⁵ configuration ion in a trigonal ligand-field. According to the suggestion of the optical absorption studies, we assume that the Mn²⁺ ion enters the host lattice interstitially and the distorted octahedral symmetry for the impurity ion is trigonal. Moreover, the local lattice structure parameters of the system are determined. The results show that the six oxygen ions around the Mn²⁺ ion are at the same distance R=2.115 Å, and there are three Mn-O bonds forming an angle θ₁ of 66.26° with the C₃-axis and three others forming an angle θ₂ of 43.40°.