A calculation of effective g-tensor values for R3+ ions in RBa 2Cu 3O 7 − δ and RBa 2Cu 4O 8 ( R = Rare Earth): Lowtemperature ordering of Rare-Earth moments

Abstract

Effective values of the g-tensor components for the various rare-earth ions ( R 3+) in the compounds RBa 2Cu 3O 7 − δ and RBa 2Cu 4O 8 ( R = Rare Earth) at low temperatures have been calculated using the crystalline electric field parameters as determined by inelastic neutron scattering. The lowest-energy orderings of rare-earth ions in these compounds have been examined. They were predicted on the basis of the Luttinger-Tisza method, taking into account the dipolar interactions between the rare-earth ions, calculated using these g-values. It is found that the predicted low-temperature orderings are generally consistent with the reported experimental orderings.