SPIN AND ORBITAL CONTRIBUTION TO THE ANISOTROPY OF THE MAGNETIC-FIELDEFFECT ON THE E-4(G)-LEVEL OF MN2+ IN ZNS

A very precise determination has been made of the contribution of the terms mu(B)g(e)H.S and mu(B)L.H of the Zeeman Hamiltonian to the aniso tropy of the magnetic field effect on the E-4(G)-level of Mn2+ in ZnS. First, detailed excitation spectra from Kramers doublets \(E-4)Gamma( 6)), \(E-4)Gamma(7)), and spin quartet \(E-4)Gamma(8)) to fundamental Zeeman states \((6)A(1)) SMS), have been analyzed up to 5 T for B\\[00 1] and B\\[111]. Second, for B = 5 T, T = 2K, angular variations of tr ansitions \(E-4) Gamma(6)), \(E-4) Gamma(7)) and \(E-4) Gamma(8)) - (( 6)A(1))SMS = -5/2) hale been studied for B rotating around the axis [1 (1) over bar0$]. For all orientations of the magnetic field, the exper imental and theoretical energy levels as given by the Hamiltonian mu(B )g(e)H.S, differ by at most 0.2 cm(-1). Finally, the very small contri bution of the term in mu(B)H.L has been studied by using an equivalent operator mimicking the second-order perturbation schemes involving th e spin-orbit interaction and the operator L.H.