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Flux dynamics in (Y, Nd)1Ba2Cu3O7−δ superconductors

Journal Article


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Abstract


  • The vortex dynamics of (Y, Nd)Ba2Cu3O7−δ ((Y, Nd)123) superconductors have been studied

    using magnetic relaxation measurements obtained at different sweep rates. The temperature dependence of

    the dynamic relaxation rate (Q) is found to be not vanishing at T = 0 K, and also showed well developed

    maxima becoming broader and tending to move to higher temperatures with decreasing magnetic field.

    At temperatures close to the critical temperature (Tc), Q(T) showed well-developed minima becoming

    deeper and tending to move to lower temperatures with increasing field. These minima appeared to occur

    approximately at the same reduced temperature position [T/Tc] as that of oxygen-controlled-melt-grown

    (OCMG)-Nd(123) samples, thus providing further support for pinning similarities between both systems.

    Both the field dependence of the characteristic pinning energy [Uc] and relaxation rate showed significant

    inconsistency with the collective pinning theory but full agreement with the results of [Perkins et al., Phys.

    Rev. B 54, 12551 (1996)].

Publication Date


  • 2011

Citation


  • Mahmoud, A. S., Horvat, J. & Dou, S. Xue. (2011). Flux dynamics in (Y, Nd)1Ba2Cu3O7−δ superconductors. European Physical Journal: Applied Physics, 53 (1), 10801-p1-10801-p9.

Scopus Eid


  • 2-s2.0-79551672317

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6292&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3361

Start Page


  • 10801-p1

End Page


  • 10801-p9

Volume


  • 53

Issue


  • 1

Abstract


  • The vortex dynamics of (Y, Nd)Ba2Cu3O7−δ ((Y, Nd)123) superconductors have been studied

    using magnetic relaxation measurements obtained at different sweep rates. The temperature dependence of

    the dynamic relaxation rate (Q) is found to be not vanishing at T = 0 K, and also showed well developed

    maxima becoming broader and tending to move to higher temperatures with decreasing magnetic field.

    At temperatures close to the critical temperature (Tc), Q(T) showed well-developed minima becoming

    deeper and tending to move to lower temperatures with increasing field. These minima appeared to occur

    approximately at the same reduced temperature position [T/Tc] as that of oxygen-controlled-melt-grown

    (OCMG)-Nd(123) samples, thus providing further support for pinning similarities between both systems.

    Both the field dependence of the characteristic pinning energy [Uc] and relaxation rate showed significant

    inconsistency with the collective pinning theory but full agreement with the results of [Perkins et al., Phys.

    Rev. B 54, 12551 (1996)].

Publication Date


  • 2011

Citation


  • Mahmoud, A. S., Horvat, J. & Dou, S. Xue. (2011). Flux dynamics in (Y, Nd)1Ba2Cu3O7−δ superconductors. European Physical Journal: Applied Physics, 53 (1), 10801-p1-10801-p9.

Scopus Eid


  • 2-s2.0-79551672317

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6292&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3361

Start Page


  • 10801-p1

End Page


  • 10801-p9

Volume


  • 53

Issue


  • 1