Extraordinary effect of aluminum substitution on the upper critical field of Ba2YCu3O7

R. B. Van Dover, Lynn Schneemeyer, J. V. Waszczak, D. A. Rudman, J. Y. Juang, J. A. Cutro

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Abstract

A 10% substitution of Al on the Cu(1) (chain) site of single crystals of Ba2YCu3O7 drives the material to the edge of the orthorhombic-tetragonal transition and strongly decreases the resistivity and upper critical field, compared to the unsubstituted parent compound, but has little effect on Tc. The coherence length in the ĝ-b^ plane increases twofold, while the coherence length along the axis is unchanged. These results can be reconciled with the conventional relationships between superconducting and normal-state properties only if a twofold change in the Fermi-surface area is postulated.

Original languageEnglish
Pages (from-to)2932-2935
Number of pages4
JournalPhysical Review B
Volume39
Issue number4
DOIs
StatePublished - 1 Jan 1989

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Aluminum
Substitution reactions
substitutes
aluminum
Fermi surface
Fermi surfaces
Single crystals
electrical resistivity
single crystals

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Van Dover, R. B., Schneemeyer, L., Waszczak, J. V., Rudman, D. A., Juang, J. Y., & Cutro, J. A. (1989). Extraordinary effect of aluminum substitution on the upper critical field of Ba2YCu3O7. Physical Review B, 39(4), 2932-2935. https://doi.org/10.1103/PhysRevB.39.2932
Van Dover, R. B. ; Schneemeyer, Lynn ; Waszczak, J. V. ; Rudman, D. A. ; Juang, J. Y. ; Cutro, J. A. / Extraordinary effect of aluminum substitution on the upper critical field of Ba2YCu3O7. In: Physical Review B. 1989 ; Vol. 39, No. 4. pp. 2932-2935.
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Van Dover, RB, Schneemeyer, L, Waszczak, JV, Rudman, DA, Juang, JY & Cutro, JA 1989, 'Extraordinary effect of aluminum substitution on the upper critical field of Ba2YCu3O7', Physical Review B, vol. 39, no. 4, pp. 2932-2935. https://doi.org/10.1103/PhysRevB.39.2932

Extraordinary effect of aluminum substitution on the upper critical field of Ba2YCu3O7. / Van Dover, R. B.; Schneemeyer, Lynn; Waszczak, J. V.; Rudman, D. A.; Juang, J. Y.; Cutro, J. A.

In: Physical Review B, Vol. 39, No. 4, 01.01.1989, p. 2932-2935.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Van Dover, R. B.

AU - Schneemeyer, Lynn

AU - Waszczak, J. V.

AU - Rudman, D. A.

AU - Juang, J. Y.

AU - Cutro, J. A.

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AB - A 10% substitution of Al on the Cu(1) (chain) site of single crystals of Ba2YCu3O7 drives the material to the edge of the orthorhombic-tetragonal transition and strongly decreases the resistivity and upper critical field, compared to the unsubstituted parent compound, but has little effect on Tc. The coherence length in the ĝ-b^ plane increases twofold, while the coherence length along the axis is unchanged. These results can be reconciled with the conventional relationships between superconducting and normal-state properties only if a twofold change in the Fermi-surface area is postulated.

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