Substructural variations in YBa2Cu3O7-x

Mehmet Sarikaya, Ryoichi Kikuchi, Edward A. Stern, Ilhan A. Aksay

Research output: Contribution to journalConference articlepeer-review


Structural characterization of high temperature superconducting YBa2Cu3O7-x compounds have been made by transmission electron microscopy imaging and diffraction techniques. As a consequence of the tetragonal to orthorhombic transformation, twins form with {110} twin planes and with varying twin boundary spacings. Microdiffraction analysis at the 10 nm scale indicates local variations of Δa/a, where Δa is the difference between a and b directions of the orthorhombic phase. These studies indicate a spatial variation in the orthorhombicity in a single grain and, hence, nonhomogeneous distribution of regions with insulating character. The effects of these variations on the superconductivity are discussed.

Original languageEnglish
Pages (from-to)60-68
Number of pages9
JournalInternational SAMPE Symposium and Exhibition (Proceedings)
StatePublished - 1988
Externally publishedYes
Event2nd International SAMPE Electronics Conference - Electronic Materials and Processes - Seattle, WA, USA
Duration: 14 Jun 198816 Jun 1988


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