Crystal structures and superconducting properties of metallic double-chain based cuprate Pr2Ba4Cu7O15-delta
arXiv:2401.12037 · doi:10.7566/JPSJ.93.044705
Abstract
We demonstrated the lattice structures and the superconducting phases of metallic double-chain based cuprate Pr2Ba4Cu7O15-delta exhibiting higher Tc. After the oxygen heat treatment on citrate pyrolysis precursors, their reduction treatment followed by a quench procedure caused higher Tc samples with 26.5-30 K. The crystal structural parameters for the superconducting sample (delta = 0.81) were analyzed from the powder synchrotron X-ray diffraction data using RIETAN-FP program. The effect of magnetic field on the superconducting phase of these samples with different oxygen defects (delta =0.73, 0.81 and 0.87) was examined, for our understanding of the superconducting magnetic field-temperature phase diagram. For delta = 0.87 sample with Tc = 30 K, the resistive critical field Hc* was estimated to be 13 T at 4.2 K. The oxygen deficiency dependence on Tc,on for our samples was compared with the data of several other groups.
8 pages, 6 figures
References in corpus (5)
- Superconductivity due to spin fluctuations originating from multiple Fermi surfaces in a double chain superconductor PrBaCuO}
- Filling-dependence of the zigzag Hubbard ladder for a quasi-one-dimensional superconductor Pr_2Ba_4Cu_7O_{15-delta}
- Effect of pressure on magneto-transport properties in the superconducting and normal phases of the metallic double chain compound PrBaCuO
- Nonmonotonic Pressure Dependence of the Lattice Parameter in the Quasi-one-dimensional Superconductor PrBaCuO
- Nuclear-spin evidence of insulating and antiferromagnetic state of CuO2 planes in superconducting Pr2Ba4Cu7O15-δ