Acoustic emission from YBa2Cu3Ox superconductors

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Abstract:

Yttrium-based high-temperature ceramic superconductors were prepared by the use of a conventional solid state reaction. The common superconducting properties, critical temperature and critical current at 77 K, were determined by electrical measurements. The acoustic emission from the superconducting samples was measured during the phase transition from the superconducting state to the normal state following a temperature rise from 77 to 100 K. The rate and the sum of the ultrasound pulses are presented. Correlations were noticed between acoustic emission and the superconducting parameters and superconducting state of the samples. No emission was detected during the electrical current rise up to the critical value.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/23/2/025035

Publication date: February 1, 2010

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