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Effect of metal oxide doping on the superconductivity of YBaCuO ceramics
Electromagnetic properties of CeO2 doped and undoped YBaCuO superconductors were evaluated to investigate the effect of pinning center on the magnetization and magnetic shielding. The variation ΔM with doping was maximum for 3% doping and decrease with further doping. The magnetic shielding was evaluated by measuring the induced voltage in secondary coil and the voltage initially set to 0.5V, decreased to 0.17V and 0.28V respectively for the undoped and 3% CeO2 doped sample. The much less change in the induced voltage for the 3% doped sample is attributed to the increased flux shielding by shielding vortex current. The CeO2 was converted to fine BaCeO3 particles which were trapped in YBaCuO superconductor during the reaction sintering. The trapped fine particles, BaCeO3 may be acted as a flux pinning center.
Effect of metal oxide doping on the superconductivity of YBaCuO ceramics
Electromagnetic properties of CeO2 doped and undoped YBaCuO superconductors were evaluated to investigate the effect of pinning center on the magnetization and magnetic shielding. The variation ΔM with doping was maximum for 3% doping and decrease with further doping. The magnetic shielding was evaluated by measuring the induced voltage in secondary coil and the voltage initially set to 0.5V, decreased to 0.17V and 0.28V respectively for the undoped and 3% CeO2 doped sample. The much less change in the induced voltage for the 3% doped sample is attributed to the increased flux shielding by shielding vortex current. The CeO2 was converted to fine BaCeO3 particles which were trapped in YBaCuO superconductor during the reaction sintering. The trapped fine particles, BaCeO3 may be acted as a flux pinning center.
Effect of metal oxide doping on the superconductivity of YBaCuO ceramics
Sang Heon Lee, (Autor:in)
01.10.2006
334168 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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