Superposition Model analysis of Zero field splitting for Mn2+ in (NH4)2SbF5 and (TEA)2BX4(B = Zn, Ni)  (X = Cl,Br)  single crystals.

S.S. Hooda; R.S. Bansal

Volume : V, Issue : VIII, August - 2015

Superposition Model analysis of Zero field splitting for Mn2+ in (NH4)2SbF5 and (TEA)2BX4(B = Zn, Ni) (X = Cl,Br) single crystals.

S. S. Hooda, R. S. Bansal

Abstract :

The Newman superposition model has been used to investigate the substitution of Mn2+ for Sb3+ site in Ammonium Pentaflouroantimonate (III) and for Zn2+ site in Tetra Ethyal Ammonium (TEA) single crystal. The calculated values of zero field splitting parameter b02 at room temperature fit the experimental one taken from the literature with average intrinsic parameters b2(F) = –0.059 cm–1 for fluorine and b2(Cl) = –0.0443 cm–1 for chlorine taken t2 = 7±2 and t4 = 10± 2 for Mn2+ doped in Ammonium Peta fluoro antimonite (III) single crystal.The values of b2determined for Mn2+ doped in tetra ethyal ammonium are – 0.0443 cm–1 single crystal.The superposition model analysis shows that for large values of b20, b22, b40, b42 and b44 intrinsic parameters ?b2 and ?b4 can be estimated with suitable error but for small values of these spin – Hamiltonian parameters it is very difficult to predict the correct sign and magnitude. The present study about superposition model is very useful to get information about the zero field splitting of parameters ions in some host single crystals.