What is recorded here?
Ren and colleagues reported superconducting signatures in fluorine-doped samarium iron oxypnictide. Electrical resistivity began its transition at 55.0 kelvin and reached the reported zero-resistance level at 52.6 kelvin; magnetic susceptibility showed an onset of diamagnetic response at 54.6 kelvin. These observations extended the experimentally explored transition-temperature range of the layered iron-arsenide family.
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Scientific scope
The reported 55 kelvin is a resistive onset, not the zero-resistance or susceptibility midpoint temperature. Diffraction indicated a principal target phase together with impurity phases; the authors cautioned that actual fluorine content could be substantially lower than the nominal composition. Measurements concern the reported polycrystalline sample, with no determination of pairing mechanism or universal temperature limit. Earlier lanthanum iron-arsenide superconductivity work is a separate contribution.
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People and systems
Zhi-An Ren; Wei Lu; Jie Yang; Wei Yi; Xiao-Li Shen; Zheng-Cai Li; Guang-Can Che; Xiao-Li Dong; Li-Ling Sun; Fang Zhou; Zhong-Xian Zhao
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English catalogue narrative
Superconductivity near 55 K in fluorine-doped samarium iron oxypnictide
Ren and colleagues reported superconducting signatures in fluorine-doped samarium iron oxypnictide. Electrical resistivity began its transition at 55.0 kelvin and reached the reported zero-resistance level at 52.6 kelvin; magnetic susceptibility showed an onset of diamagnetic response at 54.6 kelvin. These observations extended the experimentally explored transition-temperature range of the layered iron-arsenide family.
Scientific scope
The reported 55 kelvin is a resistive onset, not the zero-resistance or susceptibility midpoint temperature. Diffraction indicated a principal target phase together with impurity phases; the authors cautioned that actual fluorine content could be substantially lower than the nominal composition. Measurements concern the reported polycrystalline sample, with no determination of pairing mechanism or universal temperature limit. Earlier lanthanum iron-arsenide superconductivity work is a separate contribution.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
Zhi-An Ren; Wei Lu; Jie Yang; Wei Yi; Xiao-Li Shen; Zheng-Cai Li; Guang-Can Che; Xiao-Li Dong; Li-Ling Sun; Fang Zhou; Zhong-Xian Zhao
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
Original sources
- [Superconductivity at 55 K in iron-based F-doped layered quaternary compound Sm[O1-xFx]FeAs](https://arxiv.org/pdf/0804.2053v1)