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Effect of nano-sized Co3O4 addition on the transport properties of YBa2Cu3O7−δ

Abd Shukor, Roslan and M. H., Nazrin and I., Nor Aisyah and Lee, W. K. and Yusrianto, E. and A. N., Jannah and Shaari, Abdul Halim (2013) Effect of nano-sized Co3O4 addition on the transport properties of YBa2Cu3O7−δ. In: International Cryogenic Materials Conference on Advances in Cryogenic Engineering, 17–21 June 2013, Anchorage, Alaska. pp. 268-273.

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The effect of nano-sized Co3O4 (10 - 30 nm) addition on YBa2Cu3O7−δ(Co3O4)x with x = 0 to 0.12 wt.% has been investigated by powder X-ray diffraction method, dc electrical resistance measurements and scanning electron microscopy. The Co3O4 particle size was larger than the coherence length but smaller than the penetration depth of the YBa2Cu3O7−δ superconductor. The onset transition temperature (T c onset) showed no significant changes for low Co3O4 addition (x ≤ 0.02 wt. %) and then decreased monotonically with the increase in Co3O4 content indicating a pair-breaking like mechanism in T c suppression for x = 0.03 to 0.12 wt. %. A sudden broadening of the superconducting-transition-width for x ≥ 0.11 wt. % was also observed. The transport properties were measured and related to the microstructure. Scanning electron micrographs showed homogeneous distribution of Co3O4 throughout the samples and the distance between particles was smaller than 1 μm but larger than the typical Abrikosov vortex lattice constant.

Item Type:Conference or Workshop Item (Paper)
Keyword:Nano Co3O4 addition; Electrical resistance; YBa2Cu3O7 superconductor
Faculty or Institute:Faculty of Science
Publisher:AIP Publishing LLC
DOI Number:10.1063/1.4860634
ID Code:37279
Deposited By: Nabilah Mustapa
Deposited On:17 May 2016 11:25
Last Modified:17 May 2016 11:25

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