Double plateau T-c behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz

JMS Skakle; Alan Templeton; EE Lachowski; Anthony Roy West

doi:10.1016/0921-4534(96)00127-X

Double plateau T-c behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz

JMS Skakle^*, Alan Templeton, EE Lachowski, Anthony Roy West

^*Corresponding author for this work

University of Sheffield

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

10 Citations (Scopus)

Abstract

Slowly cooled samples of the tetragonal superconductor LaBa1.5Ca0.5Cu3Oz show a ''double plateau'' in plots of T-c against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in T-c of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.

Original language	English
Pages (from-to)	137-142
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	260
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(96)00127-X
Publication status	Published - 1 Apr 1996

Bibliographical note

We thank Engineering and Physical Sciences Research Council (EPSRC) for funding.

Keywords

OXYGEN STOICHIOMETRY
ELECTRON-DIFFRACTION
SUPERCONDUCTIVITY
YBA2CU3O7-DELTA
TEMPERATURE
BA2YCU3OX

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title = "Double plateau T-c behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz",

abstract = "Slowly cooled samples of the tetragonal superconductor LaBa1.5Ca0.5Cu3Oz show a ''double plateau'' in plots of T-c against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in T-c of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.",

keywords = "OXYGEN STOICHIOMETRY, ELECTRON-DIFFRACTION, SUPERCONDUCTIVITY, YBA2CU3O7-DELTA, TEMPERATURE, BA2YCU3OX",

author = "JMS Skakle and Alan Templeton and EE Lachowski and West, {Anthony Roy}",

note = "We thank Engineering and Physical Sciences Research Council (EPSRC) for funding. ",

year = "1996",

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doi = "10.1016/0921-4534(96)00127-X",

language = "English",

volume = "260",

pages = "137--142",

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TY - JOUR

T1 - Double plateau T-c behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz

AU - Skakle, JMS

AU - Templeton, Alan

AU - Lachowski, EE

AU - West, Anthony Roy

N1 - We thank Engineering and Physical Sciences Research Council (EPSRC) for funding.

PY - 1996/4/1

Y1 - 1996/4/1

N2 - Slowly cooled samples of the tetragonal superconductor LaBa1.5Ca0.5Cu3Oz show a ''double plateau'' in plots of T-c against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in T-c of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.

AB - Slowly cooled samples of the tetragonal superconductor LaBa1.5Ca0.5Cu3Oz show a ''double plateau'' in plots of T-c against z, whereas quenched samples show a linear variation. No evidence for superstructure formation is observed by electron diffraction. Unit-cell parameters a and c vary linearly with x for slowly cooled samples, but non-linearly for quenched samples. For a given z, the difference in T-c of quenched and slow-cooled samples may indicate a net transfer of charge between the Cu(2)-oxygen planes and the Cu(1)-oxygen chains which is dependent on the thermal history of the samples rather than on ordering of oxygen vacancies.

KW - OXYGEN STOICHIOMETRY

KW - ELECTRON-DIFFRACTION

KW - SUPERCONDUCTIVITY

KW - YBA2CU3O7-DELTA

KW - TEMPERATURE

KW - BA2YCU3OX

UR - http://www.scopus.com/inward/record.url?scp=0030129173&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(96)00127-X

DO - 10.1016/0921-4534(96)00127-X

M3 - Article

AN - SCOPUS:0030129173

SN - 0921-4534

VL - 260

SP - 137

EP - 142

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Double plateau T-c behaviour in the tetragonal LaBa1.5Ca0.5Cu3Oz

Abstract

Bibliographical note

Keywords

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