| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1817607 | Physica C: Superconductivity and its Applications | 2014 | 5 Pages |
Abstract
An investigation was carried out into the distribution of Fe ions between Cu(1) and Cu(2) sites for FeSr2RECu2O6+y (RE = Eu, Er, Gd, Nd and Y), in addition to the structural, magnetic and electric properties. After a series of annealing steps to induce superconductivity, all samples exhibited a Ba2YCu3O6-type tetragonal crystal structure and the lattice constants increased with RE ion radius. Zero resistivity was observed for FeSr2YCu2O6+y, FeSr2ErCu2O6+y and FeSr2GdCu2O6+y. 57Fe Mössbauer study revealed that for all samples except FeSr2NdCu2O6+y, about 10% of the Fe ions were present at Cu(2) sites. The separate three annealings are effective for FeSr2RECu2O6+y except FeSr2NdCu2O6+y for the suppression of Fe ion substitution at Cu(2) site and the carrier doping to CuO2 plane.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Yoshiaki Hata, Kazuhiro Yamaugchi, Kazuki Kinoshita, Eiji Kita, Takashi Mochiku, Hiroshi Yasuoka,