Structural changes upon electrochemical insertion of lithium into the Bi sub 2 Sr sub 2 CaCuO sub 8+ y high Tc superconductor
- Department of Materials Research, The Weizmann Institute of Science, P.O. Box 26, Rehovot 76100 (Israel)
- Chemistry Department, State University of New York at Buffalo, Buffalo, NY 14214 (United States)
The insertion compound Li{sub {ital x}}Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital y}} ({ital x}{le}2) was prepared by electrochemical insertion of lithium into Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital y} }pellets at room temperature in galvanic cells. The reaction proceeds with retention of the host crystal structure and without the appearance of any new phases. Bulk superconductivity persists, but the superconducting fraction appears to be lower in the reacted samples. The lithiated product was analyzed by crystallographic and chemical measurements. The results show that insertion of Li ions is accompanied by an expansion of the interlayer spacing between Bi-O planes and a small increase in the {bold a}- and {bold b}-cell parameters. This change is consistent with some, but not all, of the donated electrons entering the Cu-O planes, with a corresponding reduction in hole concentration. At higher levels of Li content, a substantial breakdown of the lattice is observed.
- DOE Contract Number:
- FG02-86ER45231
- OSTI ID:
- 7238024
- Report Number(s):
- CONF-9109102--
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Vol. 251:1; ISSN 0094-243X; ISSN APCPC
- Country of Publication:
- United States
- Language:
- English
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ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMISTRY
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTROCHEMISTRY
HIGH-TC SUPERCONDUCTORS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE