Effect of Ta2O5 addition on the texture of the Y123 superconductor

Improvement on the melt-texturing performance of a (Y,Ta)0.5BaO3–YBa2Cu3Oy composite with superconductor applications

“…In fact, the lattice parameters are unmodified when compared to that of the pure Y123 phase. This can be predicted based on the fact that the lattice parameters of the Y123 phases are independent of the Ta doping, as previously reported [13]. If the Ta atoms are not doped, this means that the decreased peritectic temperature can be attributed to the thermodynamic property.…”

“…Although previous investigation [13] has reported that the Ta content is non-soluble in the Y123 phase, a large decrease in the peritectic temperature is clearly observed due to a mixture property between the Y123 and the YBaTa perovskite phases. In this sense, a systematic study on the lattice parameter refinement as a function of the Ta content was conducted.…”

“…It is known that these crystalline defects constitute the pinning center, which improves the J c [6,7]. Some investigations were also conducted in order to verify the doping effect on the oriented grain growth, the critical current density and the critical temperature T c in the Y123 polycrystalline samples [10][11][12][13][14][15].…”

“…In the growth kinetic investigation the doping of both Pt and Nd was used in order to reduce the processing time [10,13].…”

“…The (YTa) 0.5 BaO 3 compound constitutes an effective pinning center in the texturing of the Y123 phase [5,13]. The present investigation focuses on the influence of the YBaTa content in the peritectic transformation of Y123 superconductor phase.…”