Abstract
Electrical characterization of superconductor materials exposed to external magnetic field play a important role for many technological applications. In this paper, the electrical characterization of Bi-2223 pellet prepared by conventional route was performed. The electrical resistance temperature dependence (RxT), showed a superconductor transition at around 105 K. The current-voltage (I-V) behavior under magnetic field and temperature has been investigated, the results point to a powerlaw dependence between the electrical current (I) and applied voltage (V), at different conditions, as described by the literature. The external DC magnetic field, was produced by a simple home-made apparatus, where a simple copper coil was used to produce an external DC magnetic field between 2,0 mT and 8,0 mT. Then, the dependence of the critical current (Ic) on magnetic field and temperature has been studied, revealing a double step behavior DOI: http://dx.doi.org/10.30609/JETI.2018-2.5682
Highlights
High temperature superconductor materials have been extensively investigated in the literature [1,2]
By decreasing of the temperature a one step drop of the resistance value was observed at 105 K, this critical temperature can be attributed to Bi-2223 superconductor transition
The electrical characterization performed at 80K, Figure 3, revealed a loss of superconductivity occurs approximately 50 mA at zero magnetic field, and it is successively interrupt around 40 mA, 30 mA, 20 mA and 15 mA when external magnetic fields of 2,0 mT, 4,0 mT, 6,0 mT and 8,0 mT are applied, respectively
Summary
Electrical characterization of superconductor materials exposed to external magnetic field play an important role for many technological applications. The electrical characterization of Bi-2223 pellet prepared by conventional route was performed. The electrical resistance temperature dependence (RxT), showed a superconductor transition at around 105 K. The current-voltage (I-V) behavior under magnetic field and temperature has been investigated, the results point to a power-law dependence between the electrical current (I) and applied voltage (V), at different conditions, as described by the literature. The external DC magnetic field, was produced by a simple home-made apparatus, where a simple copper coil was used to produce an external DC magnetic field between 2,0 mT and 8,0 mT. The dependence of the critical current (Ic) on magnetic field and temperature has been studied, revealing a double step behavior
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