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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 50,
  • Issue 11,
  • pp. 1399-1401
  • (1996)

Investigation of YBa2Cu3O7-δ Superconducting Ceramics Intergranular Bonds with the Method of Nonresonant Microwave Adsorption

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Abstract

By the use of the electron spin resonance (ESR) method, the relation of intra- and intergranular components in a nonresonance microwave adsorption signal was investigated for superconducting YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub> samples. It is shown that different kinds of external influences on superconducting ceramics (annealing in oxygen at 500 °C and paramagnetic molecule adsorption onto the ceramics) lead to the enhancement of intergranular bonds, while the granular properties are scarcely affected by these treatments.

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