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THE SUPERCONDUCTIVITY OF YBACUO SYSTEM WITH TRANSITIONAL STRUCTURE FROM TETRAGONAL PHASE TO ORTHORHOMBIC PHASE.

Author(s) : ZHANG Y. H.

Type of article: Article

Summary

THE INTERMEDIATE YBACUO SAMPLES OF SINGLE PHASE WITH TRANSITIONAL STRUCTURE FROM TETRAGONAL PHASE TO ORTHORHOMBIC PHASE ARE PREPARED BY QUENCHING AT DIFFERENT TEMPERATURES AND INVESTIGATED SYSTEMATICALLY. THE STRUCTURE TRANSITS FROM TETRAGONAL PHASE TO ORTHORHOMBIC PHASE AS THE QUENCHING TEMPERATURE DECREASES ; THE SAMPLES WITH TETRAGONAL PHASE ARE NONSUPERCONDUCTIVE TILL 4.2 K ; THE CRITICAL TEMPERATURE DEPENDS ON THE DEGREE OF ORTHORHOMBIC DISTORTION IN THE INTERMEDIATE SAMPLES ; THE POSSIBLE EXISTENCE OF A STRUCTURE PHASETRANSITION NEAR 100 K FOR THE NONSUPERCONDUCTIVE TETRAGONAL PHASE IS DISCOVERED FOR THE FIRST TIME. THE ELECTRICAL CONDUCTANCE AT A TEMPERATURE HIGHER THAN 100 K CAN BE EXPLAINED IN TERMS OF THE AFFECTION OF OXYGEN VACANCIES.

Details

  • Original title: THE SUPERCONDUCTIVITY OF YBACUO SYSTEM WITH TRANSITIONAL STRUCTURE FROM TETRAGONAL PHASE TO ORTHORHOMBIC PHASE.
  • Record ID : 1991-0529
  • Languages: English
  • Source: Sci. China, A - vol. 33 - n. 4
  • Publication date: 1990
  • Document available for consultation in the library of the IIR headquarters only.

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