Potassium fluoride doped LaOFeAs multiband superconductors: Evidence for extremely high upper critical field

Details Potassium fluoride doped LaOFeAs multiband superconductors: Evidence for extremely high upper critical field Potassium fluoride doped LaOFeAs multiband superconductors: Evidence for extremely high upper critical field

2008-06-22

arxiv.org/abs/0806.3571v1

Physics

Condensed Matter

Superconductivity

Scientific paper

We describe a new methodology of synthesizing the oxypnictide superconductors with potassium fluoride as a source as a source of fluorine instead of LaF3. This route also allows the substitution of potassium at lanthanum sites which leads to an increase in the upper critical field as would be expected for a multiband superconductor. We also report the highest reported Tc onset of 28.5K and highest upper critical field in these superconductors.

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