Defect structure of ferromagnetic superconducting RuSr2GdCu2O8

O I Lebedev, G Van Tendeloo, J P Attfield, Abbie McLaughlin

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13 Citations (Scopus)


The structure and defect structure of superconducting ferromagnetic bulk RuSr2GdCu2O8 has been investigated using high-resolution transmission electron microscopy and high-resolution scanning transmission microscopy. Two distinct, but closely related structures, due to ordering of rotated RuO6 octahedra and due to Cu substitution in the Ru-O layer, have been revealed. The structure of Ru1-xSr2GdCu2+xO8-delta can be described as a periodic alteration along the c axis of CuO4 planes and RuO6 octahedra. The unit-cell parameters of this phase are root 2a(p) x root 2a(p) x 2c. The possible influence of this phase and defect structure on the sensitivity of the superconductivity and magnetic properties is discussed. Local defects such as 90 S domain boundaries, (130) antiphase boundaries, and the associated dislocations are analyzed.

Original languageEnglish
Article number224524
Number of pages9
JournalPhysical Review B Condensed Matter and Materials Physics
Issue number22
Publication statusPublished - Jun 2006


  • Coexistence
  • YBA2CU3O7
  • Crystal
  • State
  • Order


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