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Title: Effect of nano-sized Co{sub 3}O{sub 4} addition on the transport properties of YBa{sub 2}Cu{sub 3}O{sub 7−δ}

The effect of nano-sized Co{sub 3}O{sub 4} (10 - 30 nm) addition on YBa{sub 2}Cu{sub 3}O{sub 7−δ}(Co{sub 3}O{sub 4}){sub 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 Co{sub 3}O{sub 4} particle size was larger than the coherence length but smaller than the penetration depth of the YBa{sub 2}Cu{sub 3}O{sub 7−δ} superconductor. The onset transition temperature (T{sub c} {sub onset}) showed no significant changes for low Co{sub 3}O{sub 4} addition (x ≤ 0.02 wt. %) and then decreased monotonically with the increase in Co{sub 3}O{sub 4} content indicating a pair-breaking like mechanism in T{sub 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 Co{sub 3}O{sub 4} throughout the samples and the distance between particles was smaller than 1 μm but larger than the typical Abrikosov vortex lattice constant.
Authors:
; ; ; ; ;  [1] ;  [2]
  1. School of Applied Physics, Universiti Kebangsaan Malaysia , 43600 Bangi, Selangor (Malaysia)
  2. Department of Physics, Universiti Putra Malaysia, 43400 Serdang, Selangor (Malaysia)
Publication Date:
OSTI Identifier:
22264041
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1574; Journal Issue: 1; Conference: International cryogenic materials conference, Anchorage, AK (United States), 17-21 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COBALT OXIDES; COHERENCE LENGTH; ELECTRIC CONDUCTIVITY; ELECTRON SCANNING; LATTICE PARAMETERS; MICROSTRUCTURE; NANOSTRUCTURES; PARTICLE SIZE; PARTICLES; PENETRATION DEPTH; SCANNING ELECTRON MICROSCOPY; SUPERCONDUCTORS; TRANSITION TEMPERATURE; X-RAY DIFFRACTION