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Neutron diffraction study of Nd-substituted FeSr2YCu2O6+δmagnetic superconductor

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Volume
468
Identifiers
DOI: 10.1016/j.physc.2008.05.026
Keywords
  • Fesr2Ycu2O6+δ
  • Nd Substitution
  • Neutron Powder Diffraction
  • Disorder
Disciplines
  • Physics

Abstract

Abstract FeSr 2YCu 2O 6+ δ with tetragonal Ba 2YCu 3O 6+ δ -type structure exhibits superconductivity around 60 K, only when it is annealed in reduced atmosphere and subsequently in oxidized atmosphere. However, FeSr 2NdCu 2O 6+ δ with the substitution of lanthanoid with large ionic radius for Y do not exhibit superconductivity even if it is annealed in the same process as superconducting FeSr 2YCu 2O 6+ δ . We have performed neutron powder diffraction of the FeSr 2Y 1− x Nd x Cu 2O 6+ δ solid solution system to investigate the effect of the Nd substitution on structure and superconductivity. The structure analysis indicates that the disorder of Sr and Nd, of oxygen on double superconducting CuO 2 sheets and of Cu and Fe prevents exhibiting superconductivity in the Nd-substituted system.

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