Bulg. J. Phys. vol.19 no.1-2 (1992), pp. 064-067

Tl-Ba-V-O Conductors

I.Z. Kostadinov1, B. Alexandrov1, V. Valtchinov1, G. Georgiev1, E. Dinolova2, O. Petrov2, Tz. Sariisky3
1Faculty of Physics, University of Sofia, 5, J. Bourchier Blvd, Sofia 1126. Bulgaria
2Institute of Applied Mineralogy, Bulgarian Academy of Sciences, Sofia, Bulgaria
3Institute for Space Research, Bulgarian Academy of Scierices, Sofia, Bulgaria
Abstract. The Tl-Ba-V-O system was studied extensively. It was found that the resistivity has a drop at about 50 K, but the a.c. susceptibility does not demonstrate the presence of superconductivity. We have failed lo obtain compounds with layered structure.

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