Preparation and superconductivity in Mg-intercalated FeTe1-xSex
碩士 === 國立中正大學 === 物理學系暨研究所 === 103 === As revealed in the x-ray-powder patterns and crystallographic data, the primitive tetragonal structure of Fe1+xTe is retained in Mg0.1FeTe1-xSex up to the solubility limit near x = 0.5. The excess Mg in Mg0.1FeTe1-xSex is found to be able to stabilize the PbO-t...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/03963367142433658374 |
| Summary: | 碩士 === 國立中正大學 === 物理學系暨研究所 === 103 === As revealed in the x-ray-powder patterns and crystallographic data, the primitive tetragonal structure of Fe1+xTe is retained in Mg0.1FeTe1-xSex up to the solubility limit near x = 0.5. The excess Mg in Mg0.1FeTe1-xSex is found to be able to stabilize the PbO-type crystal structure with space group P4/nmm. The superconductivity in Mg0.1FeTe1-xSex is very sensitive to composition and clear phase transition from paramagnetic to perfect diamagnetic state was observed only for the samples with x = 0.4 – 0.5. Magnetization data of Tc,onset around 10 K and zero resistivity near 11.5 K appear in the sample with composition Mg0.1FeTe0.5Se0.5.
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