Coherence effects in the spin relaxation of lanthanum-strontium ceramics
Kataev V. E. , Kukovitskii E. F., Talanov Yu. I. , Teitel'baum G. B.
Study of the critical behavior of the ESR line of the gadolinium ions used for spin probing of a lanthanum-strontium superconductor has made it possible to determine the magnitude of the gap and its temperature dependence in the charge-excitation spectrum.