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Flux noise in YBaCuO thin film and BiSrCaCuO single crystal

Journal Article


Abstract


  • The low frequency noise spectra originating from the temperature induced flux relaxation in YBa2Cu3O7-x thin film and Bi2Sr2CaCu2O8 single crystal have been recorded using the SQUID magnetometer with the sensitivity of 100 fWb Hz-1/2 at I0 Hz. The simultaneous record of the low field AC magnetisation response (susceptibility) shows that the temperature at which the maximum of the trapped flux relaxation rate occures is shifted below the sharp AC response originating from the superconducting to the normal state transition. The trapped flux starts to relax at considerably lower temperature. The temperature sweep shows that the "equilibrium" trapped flux depends only on temperature.

Publication Date


  • 1996

Citation


  • Janu, Z., Tichý, R., Novák, M., Gregor, V., & Wang, X. L. (1996). Flux noise in YBaCuO thin film and BiSrCaCuO single crystal. Czechoslovak Journal of Physics, 46(SUPPL. 3), 1737-1738. doi:10.1007/BF02562983

Scopus Eid


  • 2-s2.0-77958112711

Start Page


  • 1737

End Page


  • 1738

Volume


  • 46

Issue


  • SUPPL. 3

Abstract


  • The low frequency noise spectra originating from the temperature induced flux relaxation in YBa2Cu3O7-x thin film and Bi2Sr2CaCu2O8 single crystal have been recorded using the SQUID magnetometer with the sensitivity of 100 fWb Hz-1/2 at I0 Hz. The simultaneous record of the low field AC magnetisation response (susceptibility) shows that the temperature at which the maximum of the trapped flux relaxation rate occures is shifted below the sharp AC response originating from the superconducting to the normal state transition. The trapped flux starts to relax at considerably lower temperature. The temperature sweep shows that the "equilibrium" trapped flux depends only on temperature.

Publication Date


  • 1996

Citation


  • Janu, Z., Tichý, R., Novák, M., Gregor, V., & Wang, X. L. (1996). Flux noise in YBaCuO thin film and BiSrCaCuO single crystal. Czechoslovak Journal of Physics, 46(SUPPL. 3), 1737-1738. doi:10.1007/BF02562983

Scopus Eid


  • 2-s2.0-77958112711

Start Page


  • 1737

End Page


  • 1738

Volume


  • 46

Issue


  • SUPPL. 3