2008/06/22 by S. Singh, Shiv J. Singh, Jai Prakash +13 · 1 citation
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paper · pdf · doi:10.48550/arxiv.0806.3571
arxiv created 2008/06/22 · openalex publication_date 2008/06/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.