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Journal of Superconductivity and Novel Magnetism

, Volume 32, Issue 10, pp 3329–3337 | Cite as

Magnetic Relaxation Experiments in CNT-Based Magnetic Nanocomposite

  • J. Calvo-de la RosaEmail author
  • A. L. Danilyuk
  • I. V. Komissarov
  • S. L. Prischepa
  • J. Tejada
Original Paper
  • 50 Downloads

Abstract

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 Fe3C 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

Keywords

Carbon nanotubes Magnetic composite Magnetic relaxation Random magnetic anisotropy 

Notes

Acknowledgements

J. Calvo-de la Rosa acknowledges Ajuts a la Docència i a la Recerca (ADR) given by the Universitat de Barcelona and the Catalan Government for the quality accreditation given to his research group DIOPMA (2017 SGR 118). I.V. Komissarov and S.L. Prischepa acknowledge the financial support of the “Improving of the Competitiveness” Program of the National Research Nuclear University MEPhI (Moscow Engineering Physics Institute).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Materials Science and Physical Chemistry, Chemistry FacultyUniversitat de BarcelonaBarcelonaSpain
  2. 2.Belarusian State University of Informatics and RadioelectronicsMinskBelarus
  3. 3.National Research Nuclear University MEPhIMoscowRussia
  4. 4.Department of Condensed Matter, Physics FacultyUniversitat de BarcelonaBarcelonaSpain

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