Effects of Deposition Temperature on the Structural and Physical Properties of Ba(Fe1.8Co0.2)2As2 Thin Film
| العنوان: | Effects of Deposition Temperature on the Structural and Physical Properties of Ba(Fe1.8Co0.2)2As2 Thin Film |
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| المؤلفون: | Lei Zhao, J. X. Guo, B. T. Liu, H. D. Zhao, Xiuhong Dai, J. M. Song, J. T. Liang, Yu Wang |
| المصدر: | Journal of Superconductivity and Novel Magnetism. 32:869-875 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 010302 applied physics, Superconductivity, Materials science, Magnetism, Analytical chemistry, Condensed Matter Physics, Epitaxy, 01 natural sciences, Electronic, Optical and Magnetic Materials, Ion, Pulsed laser deposition, Ferromagnetism, 0103 physical sciences, Crystallite, Thin film, 010306 general physics |
| الوصف: | Ba(Fe1.8Co0.2)2As2 thin films have been grown directly on (001) SrTiO3 (STO) substrates by pulsed laser deposition at the temperatures from 640 to 700 ∘C. Effects of deposition temperature (Ts) on the structure, magnetic, and superconducting properties of the films are investigated systematically. It is found that Ba(Fe1.8Co0.2)2As2 film grown at lower deposition temperature is polycrystalline, and the optimized temperature of 685 ∘C can yield high-quality epitaxial Ba(Fe1.8Co0.2)2As2 film. The (002) diffraction peak of Fe metal at 2𝜃 =∼ 65∘ is observed along with the (00l) diffraction peaks of Ba(Fe1.8Co0.2)2As2 films deposited at all temperatures, which is attributed to the decomposition of BaFe1.8Co0.2As2 target when a high-energy pulsed laser hit on the target in a high vacuum. X-ray photoelectron spectra of Fe 2p show that the relative percentage of zerovalent ion (Fe0) is almost equal to that of divalent ion (Fe2+) for the film deposited at 670 ∘C, which is different from that most Fe2+ ions exist in the BaFe1.8Co0.2As2 target. The saturation magnetization (Ms) increases from 7.88 to 240.5 emu/cm3 monotonously with the increase of Ba(Fe1.8Co0.2)2As2 film deposition temperature. The maximum zero-resistance temperature ( $T_{\mathrm {c}}^{0})$ of ∼16 K was obtained, which can be attributed to the high quality of the Ba(Fe1.8Co0.2)2As2 film. The coexistence of superconductivity (SC) and ferromagnetism (FM) in the BaFe1.8Co0.2As2 films was discussed. |
| تدمد: | 1557-1947 1557-1939 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::a17dbd3573c6487919cef46b8d37f9a8 https://doi.org/10.1007/s10948-018-4800-y |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........a17dbd3573c6487919cef46b8d37f9a8 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15571947 15571939 |
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