XANES study of the valence of Pb in (Tl{sub 0.5}Pb{sub 0.5})Sr{sub 2}Ca{sub 1{minus}x}Y{sub x}Cu{sub 2}O{sub 7{minus}{delta}}

Journal Article · Mon Dec 20 00:00:00 EST 1999 · International Journal of Modern Physics B

DOI:https://doi.org/10.1142/S0217979299003684· OSTI ID:20015152

Liang, G; Liu, R S; Wang, L V

Near edge x-ray-absorption spectra at Pb L{sub 3}-edges have been measured for (Tl{sub 0.5}Pb{sub 0.5})Sr{sub 2}Ca{sub 1{minus}x}Y{sub x}Cu{sub 2}O{sub 7{minus}{delta}} compound series. It is found that the intensity of the 2p {r{underscore}arrow} 6s transition feature decreases with the substitution of Ca{sup 2} by Y{sup 3}. This result indicates that some electronic charges have been transferred into the Pb(Tl)-O layers by this substitution. Detailed analysis suggests that the valence value of Pb in this compound series is close to +4 and it decreases with the increase of the Y-doping level x.

• Research Organization: Sam Houston State Univ., Huntsville, TX (US)
• OSTI ID: 20015152
• Journal Information: International Journal of Modern Physics B, Vol. 13, Issue 29-31; Conference: Second International Conference of New Theories, Discoveries and Applications of Superconductors and Related Materials (New{sup 3}SC-2), Las Vegas, NV (US), 06/01/1999; Other Information: PBD: 20 Dec 1999; ISSN 0217-9792
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
THALLIUM OXIDES
LEAD OXIDES
STRONTIUM OXIDES
CALCIUM OXIDES
YTTRIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
X-RAY SPECTRA
VALENCE
SUPERCONDUCTIVITY
ELECTRONIC STRUCTURE