High-pressure self-flux growth and characterization of Li-deficient Li0.95FeAs single crystals
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866915003479621632 |
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| author | Zhigadlo, N. D. |
| author_facet | Zhigadlo, N. D. |
| contents | Single crystals of LiFeAs were successfully grown by a self-flux method using the cubic anvil high-pressure and high-temperature technique. The reaction took place in a closed boron nitride crucible at a pressure of 1 GPa and a temperature of 1050 C. The grown crystals, retrieved from solidified lump, exhibit plate-like shapes with sizes up to 0.7 x 0.7 x 0.15 mm3. Single-crystal x-ray diffraction refinement confirmed the high structural perfection of the grown crystals (space group P4/nmm, No 129, Z = 2, a = 3.77370(10) A, c = 6.3468(6) A, and V = 90.384(9) A3) with the presence of a small deficiency on the Li site. The refined chemical composition of the produced crystals is Li0.95FeAs. Temperature-dependent magnetization measurements revealed bulk superconductivity with a superconducting transition Tc = 16 K. A comparative analysis of LiFeAs, Li1-xFeAs, and Li1-yFe1+yAs systems reveal that superconductivity is less sensitive to the Li deficiency, although it may completely disappear in the presence of both Fe excess and Li deficiency. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_01519 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-pressure self-flux growth and characterization of Li-deficient Li0.95FeAs single crystals Zhigadlo, N. D. Superconductivity Single crystals of LiFeAs were successfully grown by a self-flux method using the cubic anvil high-pressure and high-temperature technique. The reaction took place in a closed boron nitride crucible at a pressure of 1 GPa and a temperature of 1050 C. The grown crystals, retrieved from solidified lump, exhibit plate-like shapes with sizes up to 0.7 x 0.7 x 0.15 mm3. Single-crystal x-ray diffraction refinement confirmed the high structural perfection of the grown crystals (space group P4/nmm, No 129, Z = 2, a = 3.77370(10) A, c = 6.3468(6) A, and V = 90.384(9) A3) with the presence of a small deficiency on the Li site. The refined chemical composition of the produced crystals is Li0.95FeAs. Temperature-dependent magnetization measurements revealed bulk superconductivity with a superconducting transition Tc = 16 K. A comparative analysis of LiFeAs, Li1-xFeAs, and Li1-yFe1+yAs systems reveal that superconductivity is less sensitive to the Li deficiency, although it may completely disappear in the presence of both Fe excess and Li deficiency. |
| title | High-pressure self-flux growth and characterization of Li-deficient Li0.95FeAs single crystals |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2411.01519 |