Claims
- 1. A composition of matter represented by the formula Ln.sub.x A'.sub.x' A".sub.x" B.sub.y B'.sub.y' B".sub.y" O.sub.3-z, wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B, B', B" are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0.ltoreq.x<1, 0<x'<1, 0.ltoreq.x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the compound charge neutral wherein such elements are represented according to the Periodic Table of the Elements adopted by IUPAC.
- 2. The composition according to claim 1 wherein Ln is a mixture of lanthanum and at least one element other than lanthanum which is selected from the f block lanthanides.
- 3. A composition of matter represented by the formula La.sub.x A'.sub.x' A".sub.x" Co.sub.y Fe.sub.y' Cu.sub.y" O.sub.3-z wherein A' is selected from strontium, barium, calcium or magnesium, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, wherein 0.ltoreq.x<1, 0<x'<1, 0.ltoreq.x"<1, 0<y<1.1, 0<y'<1.1, 0<y"<1.1, x+x'+x"=1.0, 1.1>y+y'+y">1.0 and z is a number which renders the composition charge neutral.
- 4. The composition of matter according to claim 3 wherein A' is barium, x is 0.2, x' is 0.8, x" is 0, y is 0.62, y' is 0.21 and y" is 0.21.
- 5. The composition of matter according to claim 3 wherein A' is strontium, x is 0.2, x' is 0.8, x" is 0, y is 0.41, y' is 0.41 and y" is 0.21.
- 6. The composition of matter according to claim 3 wherein A' is strontium, x is 0.4, x' is 0.6, x" is 0, y is 0.41, y' is 0.41 and y" is 0.21.
- 7. The composition of matter according to claim 3 wherein 1 wherein A' is strontium, x is 0.3, x' is 0.7, x' is 0, y is 0.82, y' is 0.11 and y" is 0.11.
- 8. The composition of matter according to claim 3 wherein A' is strontium, x is 0.2, x' is 0.8, x" is 0, y is 0.42, y' is 0.42 and y" is 0.21.
- 9. The composition of matter according to claim 3 wherein A' is strontium, x is 0, x' is 1.0, x" is 0, y is 0.42, y' is 0.42 and y" is 0.21.
RELATED U.S. APPLICATION DATA
This application is a continuation-in-part of copending U.S. patent application Ser. No. 08/402,689, filed on Mar. 13, 1995, the Specification which is incorporated by reference and made a part of this Application.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
This invention was made with United States government support under NIST ATP Award 70NANB4H1503, awarded by the National Institute of Standards and Technology.
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Continuation in Parts (1)
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Number |
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402689 |
Mar 1995 |
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