Journal of Superconductivity

, Volume 2, Issue 3, pp 351–359 | Cite as

Color indicator of cuprate superconductivity observed by polarized light microscopy

  • H. A. Hoff
  • M. Rubinstein
  • M. S. Osofsky
  • A. K. Singh
  • L. E. Richards
  • W. L. Lechter
  • L. E. Toth
  • B. N. Das
  • C. S. Pande


A common mineralogical technique for identifying individual crystals in a heterogeneous, polycrystalline sample involves the observation at room temperature of their colors in reflected polarized light (colors of polarization). Here we present the observation that a brownish yellow (golden) color of polarization is not only characteristic of the YBa2Cu3O7 superconductor, but of the cuprate superconductors in general and is correlated with the occurrence of superconductivity.

Key words

Cuprates superconductivity optical microscopy phase differentiation 


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Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • H. A. Hoff
    • 1
  • M. Rubinstein
    • 1
  • M. S. Osofsky
    • 1
  • A. K. Singh
    • 2
  • L. E. Richards
    • 1
  • W. L. Lechter
    • 3
  • L. E. Toth
    • 1
  • B. N. Das
    • 1
  • C. S. Pande
    • 1
  1. 1.Materials Science and Technology DivisionNaval Research LaboratoryWashington, D.C.
  2. 2.AT&T Bell LaboratoriesMiddletown
  3. 3.Sachs/Freeman AssociatesLandover

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