Journal
JOURNAL OF APPLIED PHYSICS
Volume 124, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5074117
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Funding
- National Science Foundation of China (NSFC) [11404227, 51671137]
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Observations of lamellar like fringes in iron-carbon-filled vertically aligned carbon nanotubes (CNTs) produced by pyrolysis of ferrocene and rapid cooling methodologies (controlled quenching) have been investigated. The quantitative phase analysis of encapsulated Fe3C, gamma-Fe, and alpha-Fe by X-ray diffraction reveals that controlling the phase-percentage leads to control of the crystal habit and of magnetic properties. Large coercivities and variable saturation magnetizations were observed. In addition, we reported a thorough study of the hysteresis behavior, the Barkhausen effect which has to be possibly associated with the formation of interfacial-defects in the crystal areas in contact with CNT layers. Published by AIP Publishing.
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