Measurement of the Axial Magnetic Susceptibility of m-SWCNTs at High Temperatures in a Magnetic Field-Assisted FC-CVD
In: Materials, Jg. 17 (2024-06-01), Heft 11, S. 2745-2745
Online
academicJournal
Zugriff:
We synthesized some SWCNTs films under different magnetic fields and temperatures in a magnetic field-assisted FC-CVD and obtained Raman spectra of the films. By analyzing the Raman spectra, it was concluded that the SWCNTs films had defects, and the relative content of m-SWCNTs in the SWCNTs films was obtained. The trajectory of m-SWCNTs was obtained by analyzing the motion behavior of m-SWCNTs flow in the field-assisted system, and a model was built to describe the relationship between the relative content of m-SWCNTs and magnetic fields. The axial magnetic susceptibility of m-SWCNTs as a parameter was obtained by fitting the experimental results and the model. This is the first time that the axial magnetic susceptibility of m-SWCNTs has been obtained. The result obtained at 1273 K is at least two orders of magnitude greater than the magnetic susceptibilities and anisotropies of purified m-SWCNTs at 300 K, indicating that the defects increase the Curie temperature and Curie constant of m-SWCNTs. This is consistent with the spin-polarized density functional theory, which predicts that m-SWCNTs with vacancies have local magnetic moments around the vacancies and exhibit ferro- or ferrimagnetism.
Titel: |
Measurement of the Axial Magnetic Susceptibility of m-SWCNTs at High Temperatures in a Magnetic Field-Assisted FC-CVD
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Autor/in / Beteiligte Person: | Shen, Tanze ; Fu, Qiang ; Pan, Chunxu |
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Zeitschrift: | Materials, Jg. 17 (2024-06-01), Heft 11, S. 2745-2745 |
Veröffentlichung: | MDPI AG, 2024 |
Medientyp: | academicJournal |
ISSN: | 1711-2745 (print) ; 1996-1944 (print) |
DOI: | 10.3390/ma17112745 |
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