The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa
                        2
                        Cu
                        3
                        O
                        7±x
                        , and a comparison with similar substitutions in YBa
                        2
                        Cu
                        3
                        O
                        7-x

P. R. Slater; A. J. Wright; C. Greaves

doi:10.1016/0921-4534(91)90773-R

The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x

P. R. Slater^*, A. J. Wright, C. Greaves

^*Corresponding author for this work

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

20 Citations (Scopus)

Abstract

The structural effects of Zn and Fe substitutions in LaBa ₂ Cu ₃ O _7-x have been examined using time-of-flight neutron powder diffraction, and compared with previous data relating to similar studies of YBa ₂ Cu ₃ O _7-x . Although the Fe and Zn ions display a similar site preference (for Cu(1) and Cu(2), respectively) in both systems, significant structural differences have been found. In particular, higher concentrations of dopant are possible in LaBa ₂ Cu ₃ O _7±x (up to 25% Cu replacement by Zn and 66% replacement by Fe), and superconductivity is rapidly destroyed due to the incorporationof additional structural defects. For Zn substitutions, a significant concentration of vacancies on the O(4) sites is introduced, whereas Fe substitutions result in a gradual increase in structural disoder of a more general type. Evidence for this disorder is found on both the oxygen sublattice, e.g. partial filling of sites in the La plane at z = 1 2, and the cation sublattice, with some intermixing of the La and Ba ions.

Original language	English
Pages (from-to)	111-120
Number of pages	10
Journal	Physica C: Superconductivity and its Applications
Volume	183
Issue number	1-3
DOIs	https://doi.org/10.1016/0921-4534(91)90773-R
Publication status	Published - 10 Nov 1991

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(91)90773-R

Cite this

Slater, P. R., Wright, A. J., & Greaves, C. (1991). The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x. Physica C: Superconductivity and its Applications, 183(1-3), 111-120. https://doi.org/10.1016/0921-4534(91)90773-R

Slater, P. R. ; Wright, A. J. ; Greaves, C. / The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x. In: Physica C: Superconductivity and its Applications. 1991 ; Vol. 183, No. 1-3. pp. 111-120.

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title = "The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa 2 Cu 3 O 7±x , and a comparison with similar substitutions in YBa 2 Cu 3 O 7-x",

abstract = " The structural effects of Zn and Fe substitutions in LaBa 2 Cu 3 O 7-x have been examined using time-of-flight neutron powder diffraction, and compared with previous data relating to similar studies of YBa 2 Cu 3 O 7-x . Although the Fe and Zn ions display a similar site preference (for Cu(1) and Cu(2), respectively) in both systems, significant structural differences have been found. In particular, higher concentrations of dopant are possible in LaBa 2 Cu 3 O 7±x (up to 25% Cu replacement by Zn and 66% replacement by Fe), and superconductivity is rapidly destroyed due to the incorporationof additional structural defects. For Zn substitutions, a significant concentration of vacancies on the O(4) sites is introduced, whereas Fe substitutions result in a gradual increase in structural disoder of a more general type. Evidence for this disorder is found on both the oxygen sublattice, e.g. partial filling of sites in the La plane at z = 1 2, and the cation sublattice, with some intermixing of the La and Ba ions.",

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Slater, PR, Wright, AJ & Greaves, C 1991, 'The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x', Physica C: Superconductivity and its Applications, vol. 183, no. 1-3, pp. 111-120. https://doi.org/10.1016/0921-4534(91)90773-R

The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x. / Slater, P. R.; Wright, A. J.; Greaves, C.
In: Physica C: Superconductivity and its Applications, Vol. 183, No. 1-3, 10.11.1991, p. 111-120.

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

TY - JOUR

T1 - The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa 2 Cu 3 O 7±x , and a comparison with similar substitutions in YBa 2 Cu 3 O 7-x

AU - Slater, P. R.

AU - Wright, A. J.

AU - Greaves, C.

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N2 - The structural effects of Zn and Fe substitutions in LaBa 2 Cu 3 O 7-x have been examined using time-of-flight neutron powder diffraction, and compared with previous data relating to similar studies of YBa 2 Cu 3 O 7-x . Although the Fe and Zn ions display a similar site preference (for Cu(1) and Cu(2), respectively) in both systems, significant structural differences have been found. In particular, higher concentrations of dopant are possible in LaBa 2 Cu 3 O 7±x (up to 25% Cu replacement by Zn and 66% replacement by Fe), and superconductivity is rapidly destroyed due to the incorporationof additional structural defects. For Zn substitutions, a significant concentration of vacancies on the O(4) sites is introduced, whereas Fe substitutions result in a gradual increase in structural disoder of a more general type. Evidence for this disorder is found on both the oxygen sublattice, e.g. partial filling of sites in the La plane at z = 1 2, and the cation sublattice, with some intermixing of the La and Ba ions.

AB - The structural effects of Zn and Fe substitutions in LaBa 2 Cu 3 O 7-x have been examined using time-of-flight neutron powder diffraction, and compared with previous data relating to similar studies of YBa 2 Cu 3 O 7-x . Although the Fe and Zn ions display a similar site preference (for Cu(1) and Cu(2), respectively) in both systems, significant structural differences have been found. In particular, higher concentrations of dopant are possible in LaBa 2 Cu 3 O 7±x (up to 25% Cu replacement by Zn and 66% replacement by Fe), and superconductivity is rapidly destroyed due to the incorporationof additional structural defects. For Zn substitutions, a significant concentration of vacancies on the O(4) sites is introduced, whereas Fe substitutions result in a gradual increase in structural disoder of a more general type. Evidence for this disorder is found on both the oxygen sublattice, e.g. partial filling of sites in the La plane at z = 1 2, and the cation sublattice, with some intermixing of the La and Ba ions.

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Slater PR, Wright AJ, Greaves C. The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x. Physica C: Superconductivity and its Applications. 1991 Nov 10;183(1-3):111-120. doi: 10.1016/0921-4534(91)90773-R

The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa 2 Cu 3 O 7±x , and a comparison with similar substitutions in YBa 2 Cu 3 O 7-x

Abstract

ASJC Scopus subject areas

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The effects of partial substitutions of Zn and Fe on the Cu sites in LaBa ₂ Cu ₃ O _7±x , and a comparison with similar substitutions in YBa ₂ Cu ₃ O _7-x