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Jc enhancement and flux pinning of Se substituted YBCO compound

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Abstract

Y2/3 Se1/3Ba2Cu3Ox compound was fabricated by using solid state fabrication technique. Optimum heat treatments conditions for Y0.77Se0.33Ba2Cu3Ox were investigated. It was determined that the XRD results of these samples were similar to Y-123 phase with some impurities. Magnetization dependence of applied magnetic fields was measured in the range of 0–9 T at 10–50 K. The symmetric and asymmetric MH loops were obtained for the samples. Magnetization loops obtained from measurements were successfully described by the extended Valkov–Khrustalev model. The temperature and applied magnetic field dependencies of magnetization of sample were estimated and critical current density of samples was calculated by Bean model and pinning force of samples was calculated by using Lorentz force. It is found from critical current density values that Se additions were acted as a pinning center which increased critical current density.

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Acknowledgments

The work is supported by Project No. 7 of RAS Program “Quantum physics of condensed matter”.

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Correspondence to S. Demirel.

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Yakinci, Z.D., Gokhfeld, D.M., Altin, E. et al. Jc enhancement and flux pinning of Se substituted YBCO compound. J Mater Sci: Mater Electron 24, 4790–4797 (2013). https://doi.org/10.1007/s10854-013-1476-8

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  • DOI: https://doi.org/10.1007/s10854-013-1476-8

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