Evolution of tetragonal phase in the FeSe wire fabricated by a novel chemical-transformation PIT process

Details Evolution of tetragonal phase in the FeSe wire fabricated by a novel chemical-transformation PIT process Evolution of tetragonal phase in the FeSe wire fabricated by a novel chemical-transformation PIT process

2011-06-20

arxiv.org/abs/1106.3891v1

Jpn. J. Appl. Phys. 51 (2012) 010101

Physics

Condensed Matter

Superconductivity

14 pages, 6 figures

Scientific paper

10.1143/JJAP.51.010101

We fabricated superconducting FeSe wires by the chemical-transformation PIT process. The obvious correlation between annealing temperature and phase transformation was observed. Annealing above 500^{\circ}C produced wire-core transformation from hexagonal to tetragonal phase. Furthermore the hexagonal phase completely transformed into the tetragonal phase by annealing at 1000^{\circ}C. With increasing annealing temperature, the superconducting property was dramatically improved, associated with the evolution of the tetragonal phase.

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