The Impact of Ferro-and Superparamagnetic Nickel Particles on the Magnetism of YBCO Superconducting Ceramics

Abstract:

The article examines the effect of nickel nanoparticles on the magnetic properties of the YBCO superconductor. The ceramics were obtained by solid-phase synthesis using yttrium oxide, copper (II) oxide, and barium carbonate with the addition of carbon nanotubes "Taunite" of different concentrations (0, 20, 50, 70, 100 mg). Magnetic studies have demonstrated that ferromagnetism and superparamagnetism are both observed in the samples, which can be explained by the presence of nickel particles. The dependences of the magnetization in the applied magnetic field of the sample without the addition of the carbon nanotubes "Taunite" have a paramagnetic course, and their slope monotonically increased with decreasing temperature. The coercive force of the samples and the value of the magnetic moment has been determined to increase upon the decrease in temperature. The high homogeneity of the heterostructures has been demonstrated in the graphs of FC/ZFC explained by the uneven distribution of nickel nanoparticles, which do not integrate into the crystal lattice and, due to the long-range order of interaction, do not make a strong contribution to the magnetization.

• Periodical: Materials Science Forum (Volume 1052)
• Pages: 92-97
• DOI: https://doi.org/10.4028/p-zzp34o
• Online since: February 2022
• Authors: V.S. Volosatova*, A.S. Kuz'mina, Mikhail P. Kuz'min
• Keywords: CNTs "Taunite, High-Temperature Superconductivity, Nickel, Spintronics Materials, Superparamagnetism, YBCO

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