Pinning properties of Y211 added cold top-seeded YBCO grown on Y2O3 layer
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Tarih
2016
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IOP Publishing Ltd
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, samples having different composition were prepared with the cold top seeding-melt-growth (TSMG) process by using Nd123 seed. Y2O3 buffer layer was placed to bottom of the pellets consist of Y123: Y211 powder mixtures. Two samples were fabricated in stoichiometric ratios of 1:0 and 1:0.4 labeled as Y0 and Y40, respectively. The T-c onset values of Y0 and Y40 were found to be 93.4 and 93.6 K at 0 T, respectively. The dependence of the effective activation energy U of the flux pinning on the magnetic field and temperature of the sample were determined using the Arrhenius activation energy law from the resistivity curves. The magnetization measurements were performed using a vibrating sample magnetometer (VSM) at 30, 50 and 77 K. The critical current densities (J(c)) for Y0 and Y40 samples were determined to be 5.1x10(3) and 3.7x10(3) A/cm(2) at 77 K in 0 T, respectively. The normalized pinning force density versus the reduced field was examined at different temperatures to determine the pinning mechanism.
Açıklama
onference: International Physics Conference at the Anatolian Peak (IPCAP)
Location: Ataturk Univ, Nenehatun Cultural Ctr, Erzurum, TURKEY
Date: FEB 25-27, 2016
Anahtar Kelimeler
Kaynak
International Physics Conference At The Anatolian Peak (Ipcap2016)
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Künye
Çakır, B., Duman, Ş., & Aydıner, A. (2016, April). Pinning properties of Y211 added cold top-seeded YBCO grown on Y2O3 layer. In Journal of Physics: Conference Series (Vol. 707, No. 1, p. 012034). IOP Publishing.
