High-Field Pinning Potential in YBCO Films with Nanoengineered Pinning Centres

Collazos J. C., Guner S. B., Celik M. E., Oprea A., Gencer A., Crisan A.

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, cilt.28, sa.2, ss.355-360, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 2
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1007/s10948-014-2671-4
  • Dergi Adı: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.355-360
  • Anahtar Kelimeler: YBCO films, Pulsed laser deposition, Frequency dependence, AC susceptibility, Critical current density, Pinning potential, CRITICAL-CURRENT-DENSITY, SUPERCONDUCTOR THIN-FILMS, YBA2CU3O7-DELTA FILMS, COLUMNAR DEFECTS, FLUX-CREEP, ENHANCEMENT, NANODOTS, GROWTH, AXIS, NANORODS
  • Ankara Üniversitesi Adresli: Evet

Özet

Frequency-dependent AC susceptibility measurements have been used to estimate the critical current densities and pinning potential of two 1.1-mu m-thick YBCO films with nanoengineered pinning centres. The films were grown by pulsed laser deposition using a target with 4 % BaZrO3 nanoinclusions. Data were analysed in the framework of the Anderson-Kim model, collective pinning model, and a model due to Zeldov that implies a logarithmic dependence of pinning potential on the current density. It was found that the latter describes better our experimental data, and that the resulting pinning potential has reasonable high values in high magnetic field up to 9 T, indicating a high current-carrying capability in high magnetic fields.