Universal Journal of Physics and Application Vol. 7(2), pp. 144 - 148
DOI: 10.13189/ujpa.2013.010214
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Critical Current of Low-Angle Grain Boundaries in High-Tc Superconductors

Alexander Kasatkin^1,*, Vadim Tsvetkovskii¹, Pavel Borisenko^2
1 Institute of Metal Physics, National Academy of Sciences of Ukraine, 36 Vernadsky St., 03142, Kiev, Ukraine
² Radiophysics Faculty, Kiev T.Shevchenko National University, 4-g Glushkov Ave., 03022 Kiev, Ukraine

ABSTRACT

Dependence of the critical current on the misorientation angle in high-temperature superconductor [001] tilt bicrystal is theoretically examined. We suppose that in the case of relatively small values of the bicrystal misorientation angle θ (θ≤10÷15^°) the critical current is determined by depinning of vortices, which are locked by edge dislocations aligned along the bicrystal grain boundary. Dependence of the depinning critical current on the misorientation angle is calculated for this case and it reveals a good agreement with experimental data obtained on Y-Ba-Cu-O bicrystals with [001] tilt low-angle grain boundaries.

KEYWORDS
Superconductor, Bicrystal, Grain Boundary, Abrikosov Vortex, Dislocation, Pinning, Critical Current

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Alexander Kasatkin , Vadim Tsvetkovskii , Pavel Borisenko , "Critical Current of Low-Angle Grain Boundaries in High-Tc Superconductors," Universal Journal of Physics and Application, Vol. 7, No. 2, pp. 144 - 148, 2013. DOI: 10.13189/ujpa.2013.010214.

(b). APA Format:
Alexander Kasatkin , Vadim Tsvetkovskii , Pavel Borisenko (2013). Critical Current of Low-Angle Grain Boundaries in High-Tc Superconductors. Universal Journal of Physics and Application, 7(2), 144 - 148. DOI: 10.13189/ujpa.2013.010214.