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Bean–Livingston surface barriers for flux penetration in Bi 2Sr 2CaCu 2O 8+δ single crystals near the transition temperature

Bean–Livingston surface barriers for flux penetration in Bi 2Sr 2CaCu 2O 8+δ single crystals near the transition temperature,10.1016/j.physc.2011.04.0

Bean–Livingston surface barriers for flux penetration in Bi 2Sr 2CaCu 2O 8+δ single crystals near the transition temperature  
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The first field for magnetic flux penetration Hp in Bi2Sr2CaCu2O8+δ (Bi-2212) single crystals near the critical temperature Tc was investigated from the local magnetic hysteresis loops registered for different magnetic field H sweeping rates by using a scanning Hall probe microscope (SHPM) with ∼1μm effective spatial resolution. Evidences for a significant role of the surface barrier were obtained: the asymmetric shape of the magnetization loops and an anomalous change in the slope of Hp(T) close to Tc.
Journal: Physica C-superconductivity and Its Applications - PHYSICA C , vol. 471, no. 19, pp. 563-565, 2011
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