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Anisotropic Growth and Magnetic Properties of alpha ''-Fe16N2@C Nanocones
Li, Yong1; Kuang, Qifeng1; Men, Xiaoling1; Wang, Shenggang1; Li, Da1; Choi, Chuljin2; Zhang, Zhidong1
Corresponding AuthorLi, Da(dali@imr.ac.cn) ; Choi, Chuljin(cjchoi@kims.re.kr)
2021-04-01
Source PublicationNANOMATERIALS
Volume11Issue:4Pages:12
Abstractalpha ''-Fe16N2 nanomaterials with a shape anisotropy for high coercivity performance are of interest in potential applications such as rare-earth-free permanent magnets, which are difficult to synthesize in situ anisotropic growth. Here, we develop a new and facile one-pot microemulsion method with Fe(CO)(5) as the iron source and tetraethylenepentamine (TEPA) as the N/C source at low synthesis temperatures to fabricate carbon-coated tetragonal alpha ''-Fe16N2 nanocones. Magnetocrystalline anisotropy energy is suggested as the driving force for the anisotropic growth of alpha ''-Fe16N2@C nanocones because the easy magnetization direction of tetragonal alpha ''-Fe16N2 nanocrystals is along the c axis. The alpha ''-Fe16N2@C nanocones agglomerate to form a fan-like microstructure, in which the thin ends of nanocones direct to its center, due to the magnetostatic energy. The lengths of alpha ''-Fe16N2@C nanocones are similar to 200 nm and the diameters vary from similar to 10 nm on one end to similar to 40 nm on the other end. Carbon shells with a thickness of 2-3 nm protect alpha ''-Fe16N2 nanocones from oxidation in air atmosphere. The alpha ''-Fe16N2@C nanocones synthesized at 433 K show a room-temperature saturation magnetization of 82.6 emu/g and a coercive force of 320 Oe.
Keywordalpha ''-Fe16N2 permanent magnetic material one-dimensional nanocones core/shell structure anisotropic growth chemical solution method
Funding OrganizationFuture Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science and Technology and ICT ; National Natural Science Foundation of China ; National Key R&D Program of China from the ministry of Science and Technology of China
DOI10.3390/nano11040890
Indexed BySCI
Languageen
Funding ProjectFuture Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science and Technology and ICT[2016M3D1A1027835] ; National Natural Science Foundation of China[51971221] ; National Natural Science Foundation of China[52031014] ; National Key R&D Program of China from the ministry of Science and Technology of China[2017YFA0206302] ; National Key R&D Program of China from the ministry of Science and Technology of China[2017YFA0700702]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000643430400001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/162451
Collection中国科学院金属研究所
Corresponding AuthorLi, Da; Choi, Chuljin
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Korea Inst Mat Sci, 797 Changwondaero, Chang Won 51508, Gyeongnam, South Korea
Recommended Citation
GB/T 7714
Li, Yong,Kuang, Qifeng,Men, Xiaoling,et al. Anisotropic Growth and Magnetic Properties of alpha ''-Fe16N2@C Nanocones[J]. NANOMATERIALS,2021,11(4):12.
APA Li, Yong.,Kuang, Qifeng.,Men, Xiaoling.,Wang, Shenggang.,Li, Da.,...&Zhang, Zhidong.(2021).Anisotropic Growth and Magnetic Properties of alpha ''-Fe16N2@C Nanocones.NANOMATERIALS,11(4),12.
MLA Li, Yong,et al."Anisotropic Growth and Magnetic Properties of alpha ''-Fe16N2@C Nanocones".NANOMATERIALS 11.4(2021):12.
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