Stabilization of the 8-8-20 structure-type in La{sub 8-x}Ca{sub x}Cu{sub 8-y}Ni{sub y}O{sub 20}
Journal Article
·
· Journal of Solid State Chemistry
- AT&T Bell Labs., Murray Hill, NJ (United States); and others
The 8-8-20 oxygen deficient perovskite occurs in the La-Sr-Cu-O chemical system near composition La{sub 6.4}Sr{sub 1.6}Cu{sub 8}O{sub 20}. Here, the authors show that this structure can be stabilized in the La-Ca-Cu-Ni-O system based on the composition La{sub 6.4}Ca{sub 1.6}Cu{sub 6}Ni{sub 2}O{sub 20}. In the new system, a wider variation of hole concentration is possible. Transport properties of the series reveal an insulator to metal transition as a function of increasing Ca(hole) concentration. Phase stability studies suggest that Ni preferentially substitutes for octahedrally coordinated copper.
- OSTI ID:
- 223728
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 121; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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