Abstract
In single crystals of La 2 Mg 3(NO 3) 12.24H 2O containing 0.5% to 10% Nd the proton dynamic polarization factor as well as the polarization time have been measured. The results are compared with the predictions on the basis of Borghani's spin temperature theory including the influence of the factor ƒ. The dependence of the polarization factor and the polarization time on Nd concentration, temperature, microwave power and microwave frequency is discussed. Deviations between theory and experiment are explained by taking into account a proton relaxation mechanism due to Nd spin-spin interactions.
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