Magnetic Relaxation Experiments in CNT-Based Magnetic Nanocomposite

In this work, we discuss the relaxation of the magnetic moments in a novel carbon nanotube (CNT)-based nanocomposite synthesized by using chemical vapor deposition process. The material consists of a matrix of CNT filled by Fe-based nanoparticles. This structure is seen clearly by scanning and trans...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2019-10, Vol.32 (10), p.3329-3337
Main Authors: Calvo-de la Rosa, J., Danilyuk, A. L., Komissarov, I. V., Prischepa, S. L., Tejada, J.
Format: Article
Language:English
Subjects:
ANISOTROPY
CARBON NANOTUBES
Characterization and Evaluation of Materials
CHEMICAL VAPOR DEPOSITION
Condensed Matter Physics
DISTRIBUTION
HYSTERESIS
Magnetic Materials
MAGNETIC MOMENTS
Magnetism
MAGNETS
NANOCOMPOSITES
NANOPARTICLES
NANOSCIENCE AND NANOTECHNOLOGY
Original Paper
Physics
Physics and Astronomy
RAMAN SPECTROSCOPY
RELAXATION
Strongly Correlated Systems
Superconductivity
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION
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Summary:In this work, we discuss the relaxation of the magnetic moments in a novel carbon nanotube (CNT)-based nanocomposite synthesized by using chemical vapor deposition process. The material consists of a matrix of CNT filled by Fe-based nanoparticles. This structure is seen clearly by scanning and transmission. X-ray diffraction and Raman spectroscopy are used to detect the predominant Fe 3 C phase and the CNT presence in the sample, respectively. The results obtained from both hysteresis cycles, M(H), and zero field cooled-field cooled (ZFC-FC) measurements confirm that the material is characterized by both a strong ferromagnetic exchange and random magnetic anisotropy. For the first time, we have been able to fit the magnetic relaxation data, M(t), by using both the two distributions of nanoparticles data deduced from the ZFC-FC data and the temperature dependence of the magnetic anisotropy obtained from the law of approach to saturation in random magnets. Graphical Abstract
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-019-5096-2