Quadruple and quintuple perovskite-layered cuprates (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ))

Their defect chemistry and electrical properties

N. Mansourian-Hadavi, D. Ko, Thomas O Mason, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The structure-property relationships of chemically substituted quadruple- and quintuple-layered cuprate perovskites, (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ), have been investigated with an emphasis on high-temperature electrical properties. Cu doping for Ti in both systems, especially the quadruple system, improves their electrical properties; however, substantial compensation by oxygen vacancies occurs. On the other hand, isovalent Sr substitution for Ba in these systems significantly reduces the ionic compensation, i.e., the [V(o..)] concentration, as evidenced by thermogravimetry and electrical measurements. Sr substitution not only reduces the Cu-O bond length in favor of hole formation but also introduces metallic behavior as evidenced by in situ high-temperature (800-400°C) electrical conductivity and Seebeck coefficient measurements plus low-temperature resistivity measurements. A master plot of high-temperature Seebeck coefficient vs hole content of known superconductors shows that the hole content necessary for superconductivity has been achieved in some of the doped quadruple systems, yet they fail to exhibit superconductivity owing to other structural limitations. (C) 2000 Academic Press.

Original languageEnglish
Pages (from-to)216-224
Number of pages9
JournalJournal of Solid State Chemistry
Volume155
Issue number1
DOIs
Publication statusPublished - 2000

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Perovskite
cuprates
Electric properties
electrical properties
chemistry
Seebeck effect
Defects
Seebeck coefficient
defects
superconductivity
Superconductivity
substitutes
electrical resistivity
Substitution reactions
perovskites
thermogravimetry
Temperature
electrical measurement
Bond length
Oxygen vacancies

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

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title = "Quadruple and quintuple perovskite-layered cuprates (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ)): Their defect chemistry and electrical properties",
abstract = "The structure-property relationships of chemically substituted quadruple- and quintuple-layered cuprate perovskites, (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ), have been investigated with an emphasis on high-temperature electrical properties. Cu doping for Ti in both systems, especially the quadruple system, improves their electrical properties; however, substantial compensation by oxygen vacancies occurs. On the other hand, isovalent Sr substitution for Ba in these systems significantly reduces the ionic compensation, i.e., the [V(o..)] concentration, as evidenced by thermogravimetry and electrical measurements. Sr substitution not only reduces the Cu-O bond length in favor of hole formation but also introduces metallic behavior as evidenced by in situ high-temperature (800-400°C) electrical conductivity and Seebeck coefficient measurements plus low-temperature resistivity measurements. A master plot of high-temperature Seebeck coefficient vs hole content of known superconductors shows that the hole content necessary for superconductivity has been achieved in some of the doped quadruple systems, yet they fail to exhibit superconductivity owing to other structural limitations. (C) 2000 Academic Press.",
author = "N. Mansourian-Hadavi and D. Ko and Mason, {Thomas O} and Poeppelmeier, {Kenneth R}",
year = "2000",
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T1 - Quadruple and quintuple perovskite-layered cuprates (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ))

T2 - Their defect chemistry and electrical properties

AU - Mansourian-Hadavi, N.

AU - Ko, D.

AU - Mason, Thomas O

AU - Poeppelmeier, Kenneth R

PY - 2000

Y1 - 2000

N2 - The structure-property relationships of chemically substituted quadruple- and quintuple-layered cuprate perovskites, (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ), have been investigated with an emphasis on high-temperature electrical properties. Cu doping for Ti in both systems, especially the quadruple system, improves their electrical properties; however, substantial compensation by oxygen vacancies occurs. On the other hand, isovalent Sr substitution for Ba in these systems significantly reduces the ionic compensation, i.e., the [V(o..)] concentration, as evidenced by thermogravimetry and electrical measurements. Sr substitution not only reduces the Cu-O bond length in favor of hole formation but also introduces metallic behavior as evidenced by in situ high-temperature (800-400°C) electrical conductivity and Seebeck coefficient measurements plus low-temperature resistivity measurements. A master plot of high-temperature Seebeck coefficient vs hole content of known superconductors shows that the hole content necessary for superconductivity has been achieved in some of the doped quadruple systems, yet they fail to exhibit superconductivity owing to other structural limitations. (C) 2000 Academic Press.

AB - The structure-property relationships of chemically substituted quadruple- and quintuple-layered cuprate perovskites, (NdDyBa(2-x)Sr(x)Cu(2+y)Ti(2-y)O(11-δ) and NdDyCaBa(2-x)Sr(x)Cu(2+y)Ti(3-y)O(14-δ), have been investigated with an emphasis on high-temperature electrical properties. Cu doping for Ti in both systems, especially the quadruple system, improves their electrical properties; however, substantial compensation by oxygen vacancies occurs. On the other hand, isovalent Sr substitution for Ba in these systems significantly reduces the ionic compensation, i.e., the [V(o..)] concentration, as evidenced by thermogravimetry and electrical measurements. Sr substitution not only reduces the Cu-O bond length in favor of hole formation but also introduces metallic behavior as evidenced by in situ high-temperature (800-400°C) electrical conductivity and Seebeck coefficient measurements plus low-temperature resistivity measurements. A master plot of high-temperature Seebeck coefficient vs hole content of known superconductors shows that the hole content necessary for superconductivity has been achieved in some of the doped quadruple systems, yet they fail to exhibit superconductivity owing to other structural limitations. (C) 2000 Academic Press.

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