THE FIELD UP-DOWN MODEL AND ITS APPLICATION TO PARAMAGNETIC RELAXATION IN YbCl3.6H2O

Abstract

The temperature dependence of the relaxation rates in YbCl 3 .6H 2 O up to 45 K can be explained by the Raman pro cess if phonon dispersion is considered. The analysis of the measured Mossbauer spectra has been performed by means of the field up-down model. It is pointed out that there are found "dispersionlike" terms in the spectra in addition to the usual Lorentzians.