W, Kong and R, Abd-Shukor (2009) Enhanced Electrical Transport Properties of Nano NiFe2O4-added(Bi1.6Pb0.4)Sr2Ca2Cu3O10 Superconductor. Journal of Superconductivity and Novel Magnetism . ISSN 1557-1939 (Print) 1557-1947
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The effect of nanometer sized NiFe2O4 (∼15 nm) addition in Bi1.6Pb0.4Sr2Ca2Cu3O10 (Bi2223) superconductor was studied. The (Bi1.6Pb0.4)Sr2Ca2Cu3O10 superconductor was prepared through the co-precipitation method and 0.01 wt% to 0.05 wt% of nano NiFe2O4 was added. The critical temperature (T c), critical current density (J c), phase formation and microstructure were investigated. All samples showed a major Bi2223 phase with (Bi,Pb)2Sr2CaCu2O8 (Bi2212) as the minor phase. The sample with 0.01 wt% nano NiFe2O4 showed the highest T c and J c: of more than 3 orders of magnitude higher than the non-added sample at 77 K. A further nano NiFe2O4 addition (>0.01 wt%) leads to degradation of T c and J c. These results indicate that addition of an optimum amount of NiFe2O4 nanoparticles can effectively enhance the transport critical current density in this system.
|Subjects:||Physical Science > Nanoelectronics|
|Deposited On:||02 Jan 2010 09:05|
|Last Modified:||02 Jan 2010 09:05|
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