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OPTICAL DIFFERENTIATION OF ORTHORHOMBIC SUPERCONDUCTORS SUCH AS YBA(2)CU(3)O(7) FROM THEIR TETRAGONAL PRECURSOR MATERIAL.

Author(s) : HOFF H. A.

Type of article: Article

Summary

THE ORTHORHOMBIC SUPERCONDUCTING PHASE OF THIS SUPERCONDUCTOR IS SHOWN TO BE DIFFERENTIABLE FROM ITS TETRAGONAL PRECURSOR BY OPTICAL MICROSCOPY. INDIVIDUAL GRAINS 1 MICROMETER IN DIAMETER OR LARGER ARE FOUND TO EITHER EXHIBIT THE COLOUR OF THE COMPENSATOR IN REFLECTED POLARIZED LIGHT (TETRAGONAL MATERIAL) OR TO CHANGE COLOURS FROM THE COMPENSATOR (ORTHORHOMBIC MATERIAL). BY USING COLOUR DIFFERENCES, RETAINED TETRAGONAL MATERIAL AND THE ORTHORHOMBIC NATURE OF UNTWINNED AREAS OF GRAINS ARE IDENTIFIED. THE ADVANTAGE TO PRODUCING BETTER SUPERCONDUCTING SINGLE CRYSTALS AND SINTERED POLYCRYSTALLINE MATERIALS IS DISCUSSED.

Details

  • Original title: OPTICAL DIFFERENTIATION OF ORTHORHOMBIC SUPERCONDUCTORS SUCH AS YBA(2)CU(3)O(7) FROM THEIR TETRAGONAL PRECURSOR MATERIAL.
  • Record ID : 1989-1701
  • Languages: English
  • Source: J. Supercond. - vol. 1 - n. 1
  • Publication date: 1988/03
  • Document available for consultation in the library of the IIR headquarters only.

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