| Autor: |
Trokiner, A., Le Noc, L., Yakubovskii, A., Mykhalyov, K.N., Verkhovskii, S.V. |
| Zdroj: |
Zeitschrift für Naturforschung A; February 1994, Vol. 49 Issue: 1-2 p373-378, 6p |
| Abstrakt: |
As a first step of a study of the electronic properties of CuO2planes by probing calcium nuclei in the bismuth-based high-Tcmaterials we report here the structural assignment of Ca NMR lines measured in 43Ca-enriched samples of n = 2 ((Bi,Pb)2Sr2CaCu2O8+x) and n = 3 ((Bi,Pb)2Sr2-Ca2Cu3O10+x) bismuth compounds. Powdered samples were investigated as well as oriented pow ders, achieved by uniaxial alignment of the grains in a 7T magnetic field. For the main calcium site (Ca between two CuO2planes), we could determine the quadrupolar as well as the shift tensors. The results indicate that, in the same way as yttrium nuclei in YBaCuO, calcium nuclei are sensitive to the magnetic susceptibility of the metallic CuO2planes. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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