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Flux pinning mechanism in BaFe1.9Ni0.1As2 single crystals: Evidence for fluctuation in mean free path induced pinning

Journal Article


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Abstract


  • The flux pinning mechanism of BaFe1.9Ni0.1As 2 superconducting crystals have been investigated systematically by magnetic measurements up to 13 T at various temperatures. The field dependence of the critical current density, Jc, was analysed within the collective pinning model. A remarkably good agreement between the experimental results and theoretical δl pinning curve is obtained, which indicates that pinning in BaFe1.9Ni0.1As2 crystal originates from spatial variation of the mean free path. Moreover, the normalized pinning force density, Fp, curves versus h = B/Birr (B irr is the irreversibility field) were scaled using the Dew-Hughes model. Analysis suggests that point pinning alone cannot explain the observed field variation of Fp. © 2013 AIP Publishing LLC.

Publication Date


  • 2013

Citation


  • Shahbazi-Manshadi, M., Wang, X., Choi, K. Y. & Dou, S. X. (2013). Flux pinning mechanism in BaFe1.9Ni0.1As2 single crystals: Evidence for fluctuation in mean free path induced pinning. Applied Physics Letters, 103 (3), 032605-1-032605-4.

Scopus Eid


  • 2-s2.0-84881524817

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1814&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/814

Has Global Citation Frequency


Start Page


  • 032605-1

End Page


  • 032605-4

Volume


  • 103

Issue


  • 3

Place Of Publication


  • United States

Abstract


  • The flux pinning mechanism of BaFe1.9Ni0.1As 2 superconducting crystals have been investigated systematically by magnetic measurements up to 13 T at various temperatures. The field dependence of the critical current density, Jc, was analysed within the collective pinning model. A remarkably good agreement between the experimental results and theoretical δl pinning curve is obtained, which indicates that pinning in BaFe1.9Ni0.1As2 crystal originates from spatial variation of the mean free path. Moreover, the normalized pinning force density, Fp, curves versus h = B/Birr (B irr is the irreversibility field) were scaled using the Dew-Hughes model. Analysis suggests that point pinning alone cannot explain the observed field variation of Fp. © 2013 AIP Publishing LLC.

Publication Date


  • 2013

Citation


  • Shahbazi-Manshadi, M., Wang, X., Choi, K. Y. & Dou, S. X. (2013). Flux pinning mechanism in BaFe1.9Ni0.1As2 single crystals: Evidence for fluctuation in mean free path induced pinning. Applied Physics Letters, 103 (3), 032605-1-032605-4.

Scopus Eid


  • 2-s2.0-84881524817

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1814&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/814

Has Global Citation Frequency


Start Page


  • 032605-1

End Page


  • 032605-4

Volume


  • 103

Issue


  • 3

Place Of Publication


  • United States