Crystal Research and Technology
Cryst. Res. Technol. 35 (2000) 595 - Abstract -

D. Pathinettam Padiyan, C. Muthukrishnan, R. Murugesan*

Department of Physics, Manonmaniam Sundaranar University ,Tirunelveli, India
*School of Chemistry, Madurai Kamaraj University, Madurai, India

Influence of Host Lattice in Interstital Dopant Sites: EPR Studies on Cu (II) Doped Sarcosine Cadmium Bromide Single Crystals

EPR study of Cu(II) doped in sarcosine cadmium bromide single crystals are carried out at room temperature. The impurity ions occupy the interstitial position in this crystal lattice. Crystalline field around the Cu(II) ion in this low symmetry crystal is rhombic. The transitions arise from a single paramagnetic site with gxx = 2.1082, gyy = 2.0005, gzz = 2.2071, and Axx = -64 x 10-4 cm-1, Ayy = -23 x 10-4 cm-1, Azz =-185 x 10-4 cm-1. The ground state is an admixture of dx2-y2 and dz2 states. The observed molecular orbital coefficient value a2 = 0.85 reveals a moderate covalency of the s bonding and b2 = 0.967 indicates the weak pi bonding. A strong interaction between Cu(II) and nitrogen ligands is found to exist.

Keywords: EPR, CdBr, crystal, doping


The full text of this paper in pdf-Format:

If you came directly to this page, click this symbol to go to the homepage of CRT.