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PHYSICAL PROPERTIES OF THERMALLY OXIDE-COATED COPPER RIBBONS DOPED WITH SAMARIUM (YTTRIUM) AND BARIUM: SEARCH FOR ROOM TEMPERATURE SUPERCONDUCTIVITY.

[In Russian. / En russe.]

Author(s) : VERKIN B. I.

Type of article: Article

Summary

STRUCTURE, MICROSTRUCTURE, OPTICAL REFLECTION BETWEEN 1 AND 6.2 ELECTRONVOLTS, THERMAL CAPACITY, MAGNETIC SUSCEPTIBILITY AND ELECTRICAL CONDUCTION OF QUICK-QUENCHED THERMALLY OXIDE-COATED COPPER RIBBONS DOPED WITH SAMARIUM (YTTRIUM) AND BARIUM ARE STUDIED. THE OXIDE LAYER OF RIBBONS IS FOUND TO HAVE A GRANULAR MICROCRYSTALLINE STRUCTURE, THE OXIDE LAYER BEING OF A MULTIPHASE NATURE. THE UNIVALENT COPPER IS DOMINANT IN THE OXIDE LAYER. THE RATE OF OXYGEN EXCHANGE WITH GAS MEDIUM IS FOUND TO INCREASE BETWEEN 250-325 K. A VARIETY OF THE DATA REVEALS THAT FOR CURRENTS OF 70 MICROAMPERES AND AT ROOM TEMPERATURES SOME SAMPLES DISPLAY THE EXISTENCE OF REGIONS WITH ABNORMALLY LOW RESISTANCE THAT FORM A FAIRLY UNSTABLE . JOSEPHSON MEDIUM >.

Details

  • Original title: [In Russian. / En russe.]
  • Record ID : 1989-0449
  • Languages: Russian
  • Source: Fiz. nizk. Temp. - vol. 14 - n. 7
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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