Superconductivity in the Iron-Pnictide Parent Compound SrFe2As2

Details Superconductivity in the Iron-Pnictide Parent Compound SrFe2As2 Superconductivity in the Iron-Pnictide Parent Compound SrFe2As2

2009-07-23

arxiv.org/abs/0907.4141v1

Science and Technology for Humanity (TIC-STH), 2009 IEEE Toronto International Conference. p.861 (2009)

Physics

Condensed Matter

Superconductivity

5 pages, 4 eps figures, to appear in IEEE TIC-STH Conference Proceedings

Scientific paper

10.1109/TIC-STH.2009.5444377

The appearance of superconductivity at ambient pressures in the undoped iron pnictide parent compound SrFe2As2 is studied experimentally using several techniques and approaches to aid in understanding the nature of this phase. Low temperature magnetization measurements of single crystals of SrFe2As2 reveal diamagnetic screening due to the onset of superconductivity below 21 K, with volume fraction estimates varying between 0 and 15 percent. The effects of heat treatment and cold-working via severe mechanical deformation on the superconducting phase found are studied, showing that superconductivity can be suppressed via modest annealing and reinstated by cold-working.

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