The Effects of Magnetic Dopant on the Structural and Electrical Properties in Superconducting YBaCu<sub>3</sub>O<sub>7-δ</sub> Ceramic

Abstract

The work reported in this paper aims at a better understanding of the magnetic doping effects on the structural and electrical properties for a series of YBa 2 (Cu 1−x Co x ) 3 O 7−δ ceramics. The Co doped YBa 2 Cu 3 O 7−δ are (YBCO) prepared by conventional solid state reaction method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), differential thermal analysis (DTA) and resistivity measurements. The crystal lattice parameters are found to change due to the cobalt doping and tendency to a structure phase transition from orthorhombic to tetragonal, which is confirmed by the decrease of the degree of orthorhombicity. The morphology examination with SEM revealed gradual increases of grain size with x = 0.02 Co, a high porosity is observed in the doped samples compared to the pure one. The decomposition temperature of YBCO is pushed from temperatures above 975˚C to lower temperatures of 945˚C. The resistivity measurements of doped samples with x = 0.04 and 0.06; shows a deviation in from T-linear behavior due to the opening of a pseudogap.

Orthorhombic YBa2Cu3O7−δ Superconductor with TiO2 Nanoparticle Addition: Crystal Structure, Electric Resistivity, and AC Susceptibility

“…Our results showed that the diffraction peaks increased in intensity for all TiO 2added samples, particularly at x = 0.4 wt.% TiO 2 concentration, with a noticeable shift of the peak position to the high angle, as presented in Figure 1b. This might be related to thermal cycle stress or the powder pelletising process [27].…”

“…Coatings 2023, 13, x FOR PEER REVIEW 4 of 12 a noticeable shift of the peak position to the high angle, as presented in Figure 1b. This might be related to thermal cycle stress or the powder pelletising process [27]. The variation of the lattice parameters a, b, and c with TiO2 concentration is shown in Table 1.…”

Synthesis of Hg₂Sr_2-xBa_xCa₂Cu₃O₁₀Superconductor and Study the Structure and Electrical Properties

“…Such phenomena included specific heat, critical field, tunneling, etc. The superconducting B-S-C-C-O has an orthorhombic structure [3], they consist of provskite copper oxide planes sandwiched between double bismuth oxide layers with rock salt coordination, and have been compared to the Aurivillins phase [4,5].This body-centered orthorhombic Braveries lattice is only an average structure, however as the compounds display incommensurate modulation [6]. In 1988 Meada et.…”