Abstract
The formation of a mixed state in YBa2Cu3O7−x superconductors during the transport current buildup (i.e., under the action of the internal magnetic field) at T=77 K was detected by method of acoustic emission (AE). The AE signals were detected for the currents of I=0.5 and 2.7 A. The former signal corresponds to the lower critical magnetic field (H c1), as was established previously [4]. It is shown that the latter signal corresponds to the formation of a mixed state. Application of the AE method to detecting overloads in high-power superconducting circuits is considered.
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Translated from Pis’ma v Zhurnal Tekhnichesko\({{P_{As_4 } } \mathord{\left/ {\vphantom {{P_{As_4 } } {P_{Ga} }}} \right. \kern-\nulldelimiterspace} {P_{Ga} }} = \gamma \) Fiziki, Vol. 30, No. 5, 2004, pp. 60–63.
Original Russian Text Copyright © 2004 by Dul’kin.
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Dul’kin, E. Detecting mixed state in YBa2Cu3O7−x superconductors by method of acoustic emission. Tech. Phys. Lett. 30, 200–201 (2004). https://doi.org/10.1134/1.1707166
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DOI: https://doi.org/10.1134/1.1707166