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First-Principles Study of Half-Metallicity of Fe Nanobelts
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1.College of Science, Xi'an University of Science and Technology, Xi'an 710054, China;2.School of Physics and Information Technology, Shaanxi Normal University, Xi 'an 710062, China

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National Natural Science Foundation of China (11447139, 11647051); Natural Science Basis Research Plan in Shaanxi Province of China (2015JQ1027); Scientific Research Program Funded by Shaanxi Provincial Education Department (14JK1482)

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    Abstract:

    The relaxed structures and electromagnetism properties of Fe nanobelts with different cross-sections of 3×5, 3×7, 3×9, 3×11, 3×13, and 3×15 atom layers were investigated using the first-principles of projector-augmented wave (PAW) pseudo potential based on the density functional theory (DFT) framework. Results show that for all the Fe nanobelts, the relaxed structures retain the two-fold symmetry. However, the cross-section changes from rectangle shape in the beginning into a near-single-ellipse shape for the ones with atom layers of 3×5 and 3×7, and into a double-ellipse shape for other atom layers with broader cross-sections. In addition, it is found that the Fe nanobelt with 3×7 atom layer is a half-metal material: electrons with either majority spin or minority spin can pass through the Fermi level. Therefore, it can be used in the field of spintronics for producing nearly 100% spin-polarized currents.

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[Wang Sufang, Wang Chengyue, Chen Liyong, Xie You, Zhang Jianmin. First-Principles Study of Half-Metallicity of Fe Nanobelts[J]. Rare Metal Materials and Engineering,2021,50(11):3942~3948.]
DOI:10.12442/j. issn.1002-185X.20210313

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History
  • Received:April 12,2021
  • Revised:April 19,2021
  • Adopted:May 24,2021
  • Online: November 25,2021
  • Published: November 24,2021