Stabilization of the 8-8-20 structure-type in La8-xCaxCu8-yNiyO20

G. L. Roberts; R. J. Cava; S. A. Carter; J. J. Krajewski; W. F. Peck

doi:10.1006/jssc.1996.0043

Stabilization of the 8-8-20 structure-type in La_8-xCa_xCu_8-yNi_yO₂₀

G. L. Roberts, R. J. Cava, S. A. Carter, J. J. Krajewski, W. F. Peck

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The 8-8-20 oxygen deficient perovskite occurs in the La-Sr-Cu-O chemical system near composition La_6.4Sr_1.6Cu₈O₂₀. Here we show that this structure can be stabilized in the La-Ca-Cu-Ni-O system based on the composition La_6.4Ca_1.6Cu₆Ni₂O₂₀. 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.

Original language	English (US)
Pages (from-to)	319-323
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	121
Issue number	2
DOIs	https://doi.org/10.1006/jssc.1996.0043
State	Published - Feb 1 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1006/jssc.1996.0043

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title = "Stabilization of the 8-8-20 structure-type in La8-xCaxCu8-yNiyO20",

abstract = "The 8-8-20 oxygen deficient perovskite occurs in the La-Sr-Cu-O chemical system near composition La6.4Sr1.6Cu8O20. Here we show that this structure can be stabilized in the La-Ca-Cu-Ni-O system based on the composition La6.4Ca1.6Cu6Ni2O20. 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.",

author = "Roberts, {G. L.} and Cava, {R. J.} and Carter, {S. A.} and Krajewski, {J. J.} and Peck, {W. F.}",

year = "1996",

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doi = "10.1006/jssc.1996.0043",

language = "English (US)",

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T1 - Stabilization of the 8-8-20 structure-type in La8-xCaxCu8-yNiyO20

AU - Roberts, G. L.

AU - Cava, R. J.

AU - Carter, S. A.

AU - Krajewski, J. J.

AU - Peck, W. F.

PY - 1996/2/1

Y1 - 1996/2/1

N2 - The 8-8-20 oxygen deficient perovskite occurs in the La-Sr-Cu-O chemical system near composition La6.4Sr1.6Cu8O20. Here we show that this structure can be stabilized in the La-Ca-Cu-Ni-O system based on the composition La6.4Ca1.6Cu6Ni2O20. 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.

AB - The 8-8-20 oxygen deficient perovskite occurs in the La-Sr-Cu-O chemical system near composition La6.4Sr1.6Cu8O20. Here we show that this structure can be stabilized in the La-Ca-Cu-Ni-O system based on the composition La6.4Ca1.6Cu6Ni2O20. 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.

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JF - Journal of Solid State Chemistry

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ER -

Stabilization of the 8-8-20 structure-type in La_8-xCa_xCu_8-yNi_yO₂₀

Abstract

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