Superposition model analysis of zero field splitting for Mn2+ in some host single crystals

• DOI: 10.1007/s12648-013-0262-z
• Publication Date: 2013-02-28T17:42:37Z
• Authors: R. S. Bansal; P. Ahlawat; M. Bharti; S. S. Hooda
• Keywords: Ammonium fluoride

The Newman superposition model has been used to investigate the substitution of Mn2+ for Zn2+ site in ammonium tetra flurozincate dihydrate and for Co2+ site in cobalt ammonium phosphate hexahydrate and cobalt potassium phosphate hexahydrate single crystals. The calculated values of zero field splitting parameter b 2 0 at room temperature fit the experimental data with average intrinsic parameters $$ \overline{b}_{2} $$ (F) = −0.0531 cm−1 for fluorine and $$ \overline{b}_{2} $$ (O) = −0.0280 cm−1 for oxygen, taken t 2 = 7 for Mn2+ doped in ammonium tetra fluorozincate dihydrate single crystals. The values of $$ \overline{b}_{2} $$ determined for Mn2+ doped in cobalt ammonium phosphate hexahydrate are −0.049 cm−1 for site I and −0.045 cm−1 for site II and in cobalt pottasium phosphate hexahydrate single crystals it is found to be $$ \overline{b}_{2} $$ = −0.086 cm−1. We find close agreement between theoretical and experimental values of b 2 0 .