Mihalache V.Dede, M.Oral, A.Miu L.2016-02-082016-02-0820110921-4534http://hdl.handle.net/11693/21764The first field for magnetic flux penetration H p in Bi 2Sr 2CaCu 2O 8+δ (Bi-2212) single crystals near the critical temperature T c 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 ∼1 μm 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 H p(T) close to T c. © 2011 Elsevier B.V. All rights reserved.EnglishBi-2212Magnetization loopsSHPMSurface barriersBean-Livingston surface barrierBi-2212Critical temperaturesDifferent-magnetic fieldsFlux penetrationMagnetic flux penetrationMagnetization loopsScanning hall probesSHPMSpatial resolutionSurface barrierSurface barriersSweeping rateDiffractive opticsHysteresis loopsMagnetic fieldsMagnetic fluxMagnetic materialsMagnetizationSingle crystalsArticle10.1016/j.physc.2011.04.015