Electric susceptibility evidence for the electronically driven lattice dilation in cerium ethylsulphate
- 14 August 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (15) , L407-L412
- https://doi.org/10.1088/0022-3719/10/15/003
Abstract
Electric susceptibility measurements on cerium ethylsulphate show that the splitting between the lowest cerium crystal field levels varies with temperature as proposed by Fletcher and Sheard (1971). The ion-ion interactions can be represented by an Ising model in a longitudinal field, as expected for coupling of the Gamma 1 uniform lattice mode to the cerium ions. The data fitted equally well the susceptibility calculated using the mean-field approximation or using an exact expression valid for nearest-neighbour interactions only.Keywords
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