Controlling defects in double-layer cuprates by chemical modifications

P. A. Salvador, K. B. Greenwood, K. Otzschi, J. W. Koenitzer, B. M. Dabrowski, Kenneth R Poeppelmeier, Thomas O Mason

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In-situ high temperature electrical conductivity and thermopower have been measured simultaneously on a number of ordered perovskite-like oxides containing double CuO4/2 sheets. Equilibrium measurements have been conducted as a function of oxygen partial pressure, temperature and chemical substitution in order to understand the relationships between the chemical architecture and the transport and defect properties. Data for LaBa2Cu2NbO8 and LaCa2Cu2GaO7 are presented and compared with those of known triple perovskite superconductors, Y1-xCaxSr2Cu2GaO7 and YBa2Cu3O7-δ, and several quadruple perovskites, Ln′Ln″Ba2Cu2M2O11 (Ln = Lanthanide, Y; M = Sn, Ti). These materials belong to a general family of superconductors which are constructed from similar `active' layers (double perovskite blocks of square-pyramidal copper-oxygen sheets), and interleaved with fixed valence cations in perovskite-like `conditioning' layers. Similarities in the transport properties of the non-superconducting and superconducting materials at elevated temperatures are illustrated, and the amount and types of defects, including carrier concentrations, are correlated with the internal chemistry and inner architecture of each material.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages171-176
Number of pages6
Volume453
Publication statusPublished - 1997
EventProceedings of the 1996 MRS Fall Symposium - Boston, MA, USA
Duration: Dec 2 1996Dec 5 1996

Other

OtherProceedings of the 1996 MRS Fall Symposium
CityBoston, MA, USA
Period12/2/9612/5/96

Fingerprint

Chemical modification
Perovskite
Superconducting materials
Defects
Oxygen
Lanthanoid Series Elements
Thermoelectric power
Rare earth elements
Partial pressure
Transport properties
Temperature
Oxides
Carrier concentration
Cations
Copper
Substitution reactions
Positive ions
perovskite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Salvador, P. A., Greenwood, K. B., Otzschi, K., Koenitzer, J. W., Dabrowski, B. M., Poeppelmeier, K. R., & Mason, T. O. (1997). Controlling defects in double-layer cuprates by chemical modifications. In Materials Research Society Symposium - Proceedings (Vol. 453, pp. 171-176). Materials Research Society.

Controlling defects in double-layer cuprates by chemical modifications. / Salvador, P. A.; Greenwood, K. B.; Otzschi, K.; Koenitzer, J. W.; Dabrowski, B. M.; Poeppelmeier, Kenneth R; Mason, Thomas O.

Materials Research Society Symposium - Proceedings. Vol. 453 Materials Research Society, 1997. p. 171-176.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Salvador, PA, Greenwood, KB, Otzschi, K, Koenitzer, JW, Dabrowski, BM, Poeppelmeier, KR & Mason, TO 1997, Controlling defects in double-layer cuprates by chemical modifications. in Materials Research Society Symposium - Proceedings. vol. 453, Materials Research Society, pp. 171-176, Proceedings of the 1996 MRS Fall Symposium, Boston, MA, USA, 12/2/96.
Salvador PA, Greenwood KB, Otzschi K, Koenitzer JW, Dabrowski BM, Poeppelmeier KR et al. Controlling defects in double-layer cuprates by chemical modifications. In Materials Research Society Symposium - Proceedings. Vol. 453. Materials Research Society. 1997. p. 171-176
Salvador, P. A. ; Greenwood, K. B. ; Otzschi, K. ; Koenitzer, J. W. ; Dabrowski, B. M. ; Poeppelmeier, Kenneth R ; Mason, Thomas O. / Controlling defects in double-layer cuprates by chemical modifications. Materials Research Society Symposium - Proceedings. Vol. 453 Materials Research Society, 1997. pp. 171-176
@inproceedings{e7c9b3d2c19e45d7b9c5a1369dfe06cf,
title = "Controlling defects in double-layer cuprates by chemical modifications",
abstract = "In-situ high temperature electrical conductivity and thermopower have been measured simultaneously on a number of ordered perovskite-like oxides containing double CuO4/2 sheets. Equilibrium measurements have been conducted as a function of oxygen partial pressure, temperature and chemical substitution in order to understand the relationships between the chemical architecture and the transport and defect properties. Data for LaBa2Cu2NbO8 and LaCa2Cu2GaO7 are presented and compared with those of known triple perovskite superconductors, Y1-xCaxSr2Cu2GaO7 and YBa2Cu3O7-δ, and several quadruple perovskites, Ln′Ln″Ba2Cu2M2O11 (Ln = Lanthanide, Y; M = Sn, Ti). These materials belong to a general family of superconductors which are constructed from similar `active' layers (double perovskite blocks of square-pyramidal copper-oxygen sheets), and interleaved with fixed valence cations in perovskite-like `conditioning' layers. Similarities in the transport properties of the non-superconducting and superconducting materials at elevated temperatures are illustrated, and the amount and types of defects, including carrier concentrations, are correlated with the internal chemistry and inner architecture of each material.",
author = "Salvador, {P. A.} and Greenwood, {K. B.} and K. Otzschi and Koenitzer, {J. W.} and Dabrowski, {B. M.} and Poeppelmeier, {Kenneth R} and Mason, {Thomas O}",
year = "1997",
language = "English",
volume = "453",
pages = "171--176",
booktitle = "Materials Research Society Symposium - Proceedings",
publisher = "Materials Research Society",

}

TY - GEN

T1 - Controlling defects in double-layer cuprates by chemical modifications

AU - Salvador, P. A.

AU - Greenwood, K. B.

AU - Otzschi, K.

AU - Koenitzer, J. W.

AU - Dabrowski, B. M.

AU - Poeppelmeier, Kenneth R

AU - Mason, Thomas O

PY - 1997

Y1 - 1997

N2 - In-situ high temperature electrical conductivity and thermopower have been measured simultaneously on a number of ordered perovskite-like oxides containing double CuO4/2 sheets. Equilibrium measurements have been conducted as a function of oxygen partial pressure, temperature and chemical substitution in order to understand the relationships between the chemical architecture and the transport and defect properties. Data for LaBa2Cu2NbO8 and LaCa2Cu2GaO7 are presented and compared with those of known triple perovskite superconductors, Y1-xCaxSr2Cu2GaO7 and YBa2Cu3O7-δ, and several quadruple perovskites, Ln′Ln″Ba2Cu2M2O11 (Ln = Lanthanide, Y; M = Sn, Ti). These materials belong to a general family of superconductors which are constructed from similar `active' layers (double perovskite blocks of square-pyramidal copper-oxygen sheets), and interleaved with fixed valence cations in perovskite-like `conditioning' layers. Similarities in the transport properties of the non-superconducting and superconducting materials at elevated temperatures are illustrated, and the amount and types of defects, including carrier concentrations, are correlated with the internal chemistry and inner architecture of each material.

AB - In-situ high temperature electrical conductivity and thermopower have been measured simultaneously on a number of ordered perovskite-like oxides containing double CuO4/2 sheets. Equilibrium measurements have been conducted as a function of oxygen partial pressure, temperature and chemical substitution in order to understand the relationships between the chemical architecture and the transport and defect properties. Data for LaBa2Cu2NbO8 and LaCa2Cu2GaO7 are presented and compared with those of known triple perovskite superconductors, Y1-xCaxSr2Cu2GaO7 and YBa2Cu3O7-δ, and several quadruple perovskites, Ln′Ln″Ba2Cu2M2O11 (Ln = Lanthanide, Y; M = Sn, Ti). These materials belong to a general family of superconductors which are constructed from similar `active' layers (double perovskite blocks of square-pyramidal copper-oxygen sheets), and interleaved with fixed valence cations in perovskite-like `conditioning' layers. Similarities in the transport properties of the non-superconducting and superconducting materials at elevated temperatures are illustrated, and the amount and types of defects, including carrier concentrations, are correlated with the internal chemistry and inner architecture of each material.

UR - http://www.scopus.com/inward/record.url?scp=0030686055&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030686055&partnerID=8YFLogxK

M3 - Conference contribution

VL - 453

SP - 171

EP - 176

BT - Materials Research Society Symposium - Proceedings

PB - Materials Research Society

ER -