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Vibration effect on magnetization and critical current density of superconductors

Journal Article


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Abstract


  • In this work the effect of vibrations on critical current density ( Jc) of superconductors has been

    studied. The vibrations are shown to affect Jc of all types of superconductors during their

    measurements, employing a vibrating sample magnetometer (VSM). Increasing vibration

    frequency ( f ) and/or amplitude (A) leads to progressive reduction of Jc as a function of magnetic

    field (Ba). The effect of vibrations is substantially stronger in thin films. It leads to development

    of unexpected kinks on Jc (Ba) curves. Analysis of magnetization loops and relaxation of

    magnetization in YBCO films revealed that the vibration effect can be treated as the effective

    reduction of pinning potential. The asymmetry of the vibration effect in ascending and

    descending Ba is observed, indicating differences in free energy of the corresponding vortex

    structures. Thermal effects induced by vibrations with large f and A are shown to have rather

    insignificant influence, while the vibrational vortex dynamics exhibit a strong impact. The

    irreversibility field (Birr) is shown to be instrumentally defined, and its value depends on VSM

    settings. In addition, the practical importance of Birr for Jc modeling is demonstrated.

Authors


  •   Golovchanskiy, Igor A. (external author)
  •   George, Jonathan (external author)
  •   Wells, Frederick (external author)
  •   Fedoseev, Sergey (external author)
  •   Rosenfeld, Anatoly B.

Publication Date


  • 2016

Citation


  • Golovchanskiy, I. A., Pan, A. V., George, J., Wells, F. S., Fedoseev, S. A. & Rozenfeld, A. (2016). Vibration effect on magnetization and critical current density of superconductors. Superconductor Science and Technology, 29 075002-1-075002-12.

Scopus Eid


  • 2-s2.0-84975267557

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2950&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1948

Start Page


  • 075002-1

End Page


  • 075002-12

Volume


  • 29

Abstract


  • In this work the effect of vibrations on critical current density ( Jc) of superconductors has been

    studied. The vibrations are shown to affect Jc of all types of superconductors during their

    measurements, employing a vibrating sample magnetometer (VSM). Increasing vibration

    frequency ( f ) and/or amplitude (A) leads to progressive reduction of Jc as a function of magnetic

    field (Ba). The effect of vibrations is substantially stronger in thin films. It leads to development

    of unexpected kinks on Jc (Ba) curves. Analysis of magnetization loops and relaxation of

    magnetization in YBCO films revealed that the vibration effect can be treated as the effective

    reduction of pinning potential. The asymmetry of the vibration effect in ascending and

    descending Ba is observed, indicating differences in free energy of the corresponding vortex

    structures. Thermal effects induced by vibrations with large f and A are shown to have rather

    insignificant influence, while the vibrational vortex dynamics exhibit a strong impact. The

    irreversibility field (Birr) is shown to be instrumentally defined, and its value depends on VSM

    settings. In addition, the practical importance of Birr for Jc modeling is demonstrated.

Authors


  •   Golovchanskiy, Igor A. (external author)
  •   George, Jonathan (external author)
  •   Wells, Frederick (external author)
  •   Fedoseev, Sergey (external author)
  •   Rosenfeld, Anatoly B.

Publication Date


  • 2016

Citation


  • Golovchanskiy, I. A., Pan, A. V., George, J., Wells, F. S., Fedoseev, S. A. & Rozenfeld, A. (2016). Vibration effect on magnetization and critical current density of superconductors. Superconductor Science and Technology, 29 075002-1-075002-12.

Scopus Eid


  • 2-s2.0-84975267557

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2950&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1948

Start Page


  • 075002-1

End Page


  • 075002-12

Volume


  • 29