Thermoelectric power study on high-Tc Bi-2212 and -2223 oxides intercalated with organic molecules zincphthalocyanine

Z. J. Huang*, J. G. Lin, Juhn-Jong Lin, C. Y. Huang, L. Grigoryan, K. Yakushi

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We have systematically studied the behavior of the thermoelectric power S for the high-Tc Bi-2212 and -2223 oxides intercalated with organic molecules zincphthalocyanine (ZnPc). The intercalating level x ranges from zero to 0.02 per formula, while Tc is degraded from 110 to 85 K for (ZnPc) nBi-2223 and from 90 to 61 K for (ZnPc) xBi-2212. It has been observed that the value of S at T = 290 K, S(290), increases with increasing x for both systems. Based on an empirical rule, the carrier concentration n is extracted from S(290). It has been found that n drops sharply for x changing from zero to 0.005, and then decreases gradually with increasing x for both the (ZnPc) xBi-2212 and -2223 systems. The relation of n with x resembles that of Tc with x. Our results suggest that the charge transfer between the ZnPc molecules and the CuO2 layers plays an important role in the Tc-suppression by the ZnPc intercalation. The Tc/Tc0-n relations for these samples fall on the same curve, contrast with the previously reported results. This scaling behavior is consistent with the universality of the Tc/Tc0-n relation which was proposed previously by Zhang and Sato.

Original languageEnglish
Pages (from-to)305-310
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume244
Issue number3-4
DOIs
StatePublished - 20 Mar 1995

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