کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1592960 | 1002680 | 2012 | 4 صفحه PDF | دانلود رایگان |
Phase diagrams of as-grown and O2-annealed FeTe1−xSex determined from magnetic susceptibility measurement were obtained. For as-grown samples, the antiferromagnetic order was fully suppressed in the range region x≥0.15, and weak superconductivity appeared when x≥0.1. Beginning at x=0.5, weak superconductivity was found to evolve into bulk superconductivity. Interestingly, for O2-annealed samples, complete suppression of magnetic order and the occurrence of bulk superconductivity were observed when x≥0.1. We found that O2-annealing induces bulk superconductivity for FeTe1−xSex. Oxygen probably plays a key role in the suppression of the magnetic order and the appearance of bulk superconductivity.
► Phase diagrams of as-grown and O2-annealed FeTe1−xSex determined from magnetic susceptibility measurement were obtained.
► For as-grown samples, weak superconductivity appeared when x≥0.1 and bulk superconductivity was established above x≥0.5.
► For O2-annealed samples, the occurrence of bulk superconductivity were observed when x≥0.1.
► We found that O2-annealing induces bulk superconductivity for FeTe1−xSex.
Journal: Solid State Communications - Volume 152, Issue 13, July 2012, Pages 1135–1138