Morphological aspects of the shear transformation in YBa2Cu3O7-δ to twin or not to twin?

A. Brokman, R. Shneck

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The fine structure of YBaCu3 07 is examined: Twin organization, planar defects, and structural phase co-existence are discussed in the context of the tetragonal to orthorhombic transformation. Heterogeneous nucleation of an insulating phase at the twin boundary and sub-grain boundaries is demonstrated. On the basis of the morphological observations, the transformation is classified as martensitic. Considering the role of twin in relieving the martensitic transformation strain, by producing a low strain energy habit plane, the feasibility of the formation of a twinless structure is discussed.

Original languageEnglish
Pages (from-to)51-62
Number of pages12
JournalPhase Transitions
Issue number1-4
StatePublished - 1 Jan 1990
Externally publishedYes


  • Superconductors
  • YBa2Cu307


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