Comparative Study of the Effect of Magnetic Nanoparticle CoFe{sub 2}O{sub 4} on Fluctuation-Induced Conductivity of Y-123 and Y-358 Superconductors
- University of Carthage, Laboratory of Physics of Materials-Structures and Properties, Department of Physics, Faculty of Sciences of Bizerte (Tunisia)
- Imam Abdulrahman Bin Faisal University, College of Sciences, Department of Physics (Saudi Arabia)
In this study, a comparative investigation of the electrical conductivity fluctuations in nano-CoFe{sub 2}O{sub 4} added to Y{sub 3}Ba{sub 5}Cu{sub 8}O{sub 18±x} (Y-358) and YBa{sub 2}Cu{sub 3}O{sub 7−d} (Y-123) products is performed. All products were made using the solid-state reaction process. X-ray powder diffraction (XRD) analyses confirmed the formation of different phases. Scanning electron microscope (SEM) analysis shows the reduction of grain size with increasing the quantity of nano-CoFe{sub 2}O{sub 4} particles for both the Y-123 and Y-358 samples. The decrease of grain size is more accentuated in the case of the Y-358 samples compared with the Y-123 ones. The data of conductivity fluctuations are examined in terms of the derivative of the electrical resistivity with respect to temperature and the logarithmic derivative of the conductivity with regard to temperature. The results illustrate the existence of a transition with two stages; intragrain and intergrain. It is demonstrated that the addition of CoFe{sub 2}O{sub 4} nanoparticles affects the electrical conductivity fluctuations, the values of the critical exponents, and the fluctuation dimensionality in YBCO systems.
- OSTI ID:
- 22919571
- Journal Information:
- Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 3; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
- Country of Publication:
- United States
- Language:
- English
Similar Records
The oxycarbonate Y[sub 1. 6]Ca[sub 0. 4]Ba[sub 4]Cu[sub 5]CO[sub 3]O[sub 11], n = 2 member of the [open quotes]123[close quotes]-type derivatives (Y[sub 1[minus]x]Ca[sub x])[sub n]Ba[sub 2n]Cu[sub 3n[minus]1]CO[sub 3]O[sub 7n[minus]3]
AC Magnetic Susceptibility of Y{sub 3}Ba{sub 5}Cu{sub 8}O{sub 18} Substituted by Nd{sup 3+} and Ca{sup 2+} Ions
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
BARIUM OXIDES
COBALT OXIDES
COMPARATIVE EVALUATIONS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
FERRITES
HIGH-TC SUPERCONDUCTORS
NANOPARTICLES
SCANNING ELECTRON MICROSCOPY
SOLIDS
X-RAY DIFFRACTION
YTTRIUM OXIDES