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Journal of Superconductivity and Novel Magnetism

, Volume 32, Issue 2, pp 405–411 | Cite as

Dynamic Magnetization Switching in NiO Nanoparticles: Pulsed Field Magnetometry Study

  • D. A. BalaevEmail author
  • A. A. Krasikov
  • A. A. Dubrovskiy
  • A. D. Balaev
  • S. I. Popkov
  • V. L. Kirillov
  • O. N. Martyanov
Original Paper
  • 161 Downloads

Abstract

The dynamic magnetization switching of antiferromagnetic nickel oxide nanoparticles with a characteristic size of 8 nm has been experimentally investigated by pulsed field magnetometry. It is shown that, due to the presence of defects in NiO nanoparticles, as in other antiferromagnetic particles, the uncompensated magnetic moment is induced by the incomplete compensation of spins at the antiferromagnetic ordering. The dynamic magnetic hysteresis loops have been studied in pulsed fields with the maximum field (\(H_{{\max }}\)) of up to 130 kOe and pulse lengths (τP) of 4, 8, and 16 ms. According to the results obtained, the coercivity (HC) depends on both the τP and \(H_{{\max }}\) values. The observed increase in the \(H_{\mathrm {C}}\) value with decreasing pulse length (i.e., with increasing switching field frequency) is unambiguously related with the relaxation processes typical of single-domain ferromagnetic nanoparticles. However, the observed effect of the maximum applied field (\(H_{{\max }})\) on the \(H_{\mathrm {C}}\) value is assumed to be a feature of antiferromagnetic nanoparticles.

Keywords

NiO nanoparticles Pulsed field magnetization Coercivity 

Notes

Acknowledgements

We are grateful to Yu.V. Knyazev, S.V. Semenov, and M.I. Kolkov for their help and to M.N. Volochaev for the TEM measurements. TEM studies were performed on the facility of Resource Sharing Center of Krasnoyarsk Scientific Center of Siberian Branch of Russian Academy of Sciences.

Funding Information

The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project no. 17-42-240138.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • D. A. Balaev
    • 1
    • 2
    Email author
  • A. A. Krasikov
    • 1
  • A. A. Dubrovskiy
    • 1
    • 2
  • A. D. Balaev
    • 1
  • S. I. Popkov
    • 1
    • 2
  • V. L. Kirillov
    • 3
  • O. N. Martyanov
    • 3
  1. 1.Kirensky Institute of PhysicsFederal Research Center KSC SB RASKrasnoyarskRussia
  2. 2.Siberian Federal UniversityKrasnoyarskRussia
  3. 3.Boreskov Institute of CatalysisRussian Academy of SciencesNovosibirskRussia

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