Thermochemistry of YBa2Cu3-xMxOy (M = Ni, Zn)

Mark A. Rodriguez, Alexandra Navrotsky, Francesca Licci

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The partial molar enthalpy of incorporation of oxygen (Aox/f) and enthalpy of formation (Af/f) have been measured via high-temperature reaction calorimetry for YBa2Cu3-xMxOy (where M = Ni, Zn) in the composition range 0.0 < x lt; 0.18. Aox/f and Af /f values were nearly independent of dopant for both Ni and Zn, with enthalpies of oxidation in the range - 86 to -110 kJ/(mol 1/2O2) and enthalpies of formation in the range -110 to -118 kJ/mol. The independence of thermodynamic behavior from superconducting properties is consistent with an electronic mechanism for Tc suppression in Zn-doped YBCO superconductors. Oxygen contents, lattice parameters, and Tc measurements are also reported.

Original languageEnglish (US)
Pages (from-to)88-94
Number of pages7
JournalPhysica C: Superconductivity and its applications
Volume329
Issue number2
DOIs
StatePublished - 2000
Externally publishedYes

Keywords

  • Doping
  • Nickel
  • Thermochemistry
  • YBaCuO-δ
  • Zinc

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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