Microstructural changes induced by lattice instabilities in La2-xBaxCuO4(x=0.125) and Nd2NiO4

C. H. Chen, S. W. Cheong, D. J. Werder, H. Takagi

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We have studied the microstructural changes associated with the structural phase transition from a low temperature orthorhombic phase to a low-temperature tetragonal phase in metallic La2-xBaxCuO4 and insulating Nd2NiO4. Employing electron microscopy, diffraction and dark field imaging the transition was found to be similar in both systems. Below the transition temperature a fine mixture exists of both tetragonal and orthorhombic domains. Details of microstructural changes of defect networks are compound specific. A simple model is also proposed to understand the microstructural changes observed in these two systems.

Original languageEnglish (US)
Pages (from-to)183-194
Number of pages12
JournalPhysica C: Superconductivity and its applications
Issue number3-4
StatePublished - Feb 20 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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