43Ca NMR investigation in bi-based high-Tc cuprates

As a first step of a study of the electronic properties of CuO2 planes by probing calcium nuclei in the Bi-based high-Tc materials, we report here the structural assignment of Ca NMR lines measured in 43Ca-enriched powders of n = 2 ((Bi, Pb)2Sr2CaCu2O8+x) et n = 3 ((Bi, Pb)2Sr2Ca2Cu3O10+y). Pour le site principal du calcium (Ca entre deux plans CuO2) bismuth compounds. For the main calcium site (Ca between two CuO2 planes) we could determine the quadrupolar as well as the shift parameters.