Determination of the material parameters of a melt-textured YBCO superconductor by DC magnetization analysis
JOURNAL OF ALLOYS AND COMPOUNDS, cilt.298, ss.285-290, 2000 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 298
- Basım Tarihi: 2000
- Doi Numarası: 10.1016/s0925-8388(99)00644-1
- Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.285-290
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
We report the isothermal magnetization cut-yes of a YBCO superconducting sample prepared by a flame-quench-melt-growth (FQMG) method. Hysteresis loops have been calculated and analyzed in the framework of a critical state model including the Meissner current. The bulk critical current and Meissner current as a function of applied field were extracted, and the volume fraction of the grains, f(g), has been estimated to be 0.64 from a comparison of the theoretical and experimental M-H hysteresis loops. The lower critical field, mu(0)H(c1), was found to be 14.4 mT. (C) 2000 Elsevier Science S.A. All rights reserved.