The effect of Y₂O₃ buffer layer on the magnetic properties of melt-processed YBCO superconductor
Yükleniyor...
Dosyalar
Tarih
2011
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer New York LLC
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
In this study, two kinds of melt-processed YBCO samples (Y₁₀₅₀₋₁ andY₁₀₅₀₋₂) grown on a buffer layer of Y₂O₃ addition were fabricated. The compacted powders were located on a crucible with Y₂O₃ powder freely poured and a buffer layer of pressed Y₂O₃ to avoid liquid to spread on the furnace plate. The superconducting transition temperature was determined by a standard four-point method at temperatures between 40 and 100 K. The transition temperatures of Y₁₀₅₀₋₁ and Y₁₀₅₀₋₂ were found to be 91.6 and 92.9 K at zero magnetic fields, respectively. The magnetization measurements were performed using a vibrating sample magnetometer (VSM) on the same system at 5, 40, and 77 K. The critical current densities for Y₁₀₅₀₋₁ and Y₁₀₅₀₋₂ samples were determined to be 6.5×10 3 and 5.6×10 3 A/cm 2 at 77 K in zero magnetic fields, respectively. The trapped magnetic field measurements of the samples were performed by using a Hall probe scanning device and a Fe-Nd-B permanent magnet at 77 K. It was found that the trapped magnetic field of the Y₁₀₅₀₋₁ sample is higher than that of the Y₁₀₅₀₋₂ sample.
Açıklama
Anahtar Kelimeler
Kaynak
Journal of Superconductivity and Novel Magnetism
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
24
Sayı
5
