التفاصيل البيبلوغرافية
| العنوان: |
Formation of metastable cubic phase and thermoelectric properties in Mg3Bi2 films deposited by magnetron sputtering. |
| المؤلفون: |
Fang, Wenqiang1 (AUTHOR), Zhu, Wenyan1 (AUTHOR), Shao, Yaoming1 (AUTHOR), Zheng, Pingping1 (AUTHOR), Si, Jianxiao1 (AUTHOR) sjx@zjnu.cn |
| المصدر: |
Applied Surface Science. Sep2022, Vol. 596, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*THERMOELECTRIC materials, *N-type semiconductors, *SEEBECK coefficient, *HIGH temperatures, *PHASE transitions, *TOPOLOGICAL property, *MAGNETRON sputtering, *THIN films |
| مستخلص: |
[Display omitted] • A metastable cubic phase of Mg 3 Bi 2 that only existed under high temperatures and high pressures was observed in the sputtered Mg 3 Bi 2 film. • A structural transition from cubic to hexagonal phase occurs as substrate temperature increases. • The n-type behavior of the cubic phase of Mg 3 Bi 2 film was initially observed, followed by the p-type behavior of the hexagonal phase of Mg 3 Bi 2 film. Mg 3 Bi 2 has become a promising candidate for studying thermoelectric, Mg-ion batteries and novel topological properties. In this paper, the Mg 3 Bi 2 thin films were deposited on glass substrates by magnetron co-sputtering under substrate temperatures ranging from 535 K to 595 K. A metastable cubic Mg 3 Bi 2 that only existed under high temperatures and high pressures was observed in the Mg 3 Bi 2 film deposited at T s = 535 K. A structural phase transition occurs as T s increases, and a textured hexagonal Mg 3 Bi 2 film was obtained at T s = 595 K. The microstructure and thermoelectric properties of cubic Mg 3 Bi 2 and hexagonal Mg 3 Bi 2 films were systematically investigated. The cubic Mg 3 Bi 2 film exhibited n-type semiconductor behavior. However, the hexagonal Mg 3 Bi 2 thin film possessed a positive Seebeck coefficient. A maximum power factor of 1.1 μWcm-1K−2 was obtained in textured hexagonal Mg 3 Bi 2 film at 393 K. Our results could pave the way toward the engineering phase of Mg 3 Bi 2 film, which has potential applications in micro-energy harvesting devices. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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