Dynamic Magnetization Switching in NiO Nanoparticles: Pulsed Field Magnetometry Study

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1007/s10948-018-4726-4

Ключевые слова: Coercivity, NiO nanoparticles, Pulsed field magnetization

Аннотация: 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 ((Formula presented.)) 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 (Formula presented.) values. The observed increase in the (Formula presented.) 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 ((Formula presented.) on the (Formula presented.) value is assumed to be a feature of antiferromagnetic nanoparticles. © 2018 Springer Science+Business Media, LLC, part of Springer Nature

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Издание

Журнал: Journal of Superconductivity and Novel Magnetism

Номера страниц: 1-7

ISSN журнала: 15571939

Издатель: Springer New York LLC

Авторы

  • Balaev D.A. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Krasikov A.A. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia)
  • Dubrovskiy A.A. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Balaev A.D. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia)
  • Popkov S.I. (RAS, Kirensky Inst Phys, Fed Res Ctr, KSC,SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Kirillov V.L. (Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia)
  • Martyanov O.N. (Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia)

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