Frequency dependent ESR of the spinglass Gd.06La.94Al2
Abstract We report ESR experiments on a LaAl 2 sample doped with 6% Gd. The experiments were performed at 1, 3, 9 and 35 GHz. We find for T ≈ T c essentially a frequency independent shift of H res , but a frequency dependence for the minimum in the linewidth. The results will be discussed in terms of static internal fields and dynamic field fluctuations.
Abstract In the application of some polymers as track detectors, the attention should be paid to the fact that the track recording properties of these polymers are changed under the influence of certain parameters, such as the electromagnetic radiations and environmental conditions. In this work the etching effects of 60Co gamma irradiated CR-39 polycarbonate have been studied. For deeper study of the structural changes in CR-39, the FTIR and UV–visible spectra have been analyzed. The FTIR spectra shows considerable changes due to the gamma exposure. The contribution of degradation mechanism is discussed.