Bean-Livingston surface barriers for flux penetration in Bi2Sr2CaCu2O8+delta single crystals near the transition temperature

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Mihalache V., Dede M., Oral A., Miu L.

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, cilt.471, sa.19-20, ss.563-565, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 471 Sayı: 19-20
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.physc.2011.04.015
  • Dergi Adı: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.563-565
  • Anahtar Kelimeler: Surface barriers, Magnetization loops, Bi-2212, SHPM, SUPERCONDUCTORS, FIELD, IRREVERSIBILITY
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

The first field for magnetic flux penetration H in Bi2Sr2CaCu2O8+delta (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 similar to 1 mu m 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. (C) 2011 Elsevier B.V. All rights reserved.