Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2019

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 (H max ) of up to 130 kOe and pulse lengths (τ P ) of 4, 8, and 16 ms. According to the results obtained, the coercivity (H C ) depends on both the τ P and H max values. The observed increase in the H 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 C value is assumed to be a feature of antiferromagnetic nanoparticles.

Журнал: Journal of Superconductivity and Novel Magnetism

Выпуск журнала: Т. 32, № 2

Номера страниц: 405-411

ISSN журнала: 15571939

Издатель: Springer New York LLC

• Balaev D.A. (Siberian Federal University)
• Krasikov A.A. (Kirensky Institute of Physics,Federal Research Center KSC SB RAS)
• Dubrovskiy A.A. (Siberian Federal University)
• Balaev A.D. (Kirensky Institute of Physics,Federal Research Center KSC SB RAS)
• Popkov S.I. (Siberian Federal University)
• Kirillov V.L. (Boreskov Institute of Catalysis,Russian Academy of Sciences)
• Martyanov O.N. (Boreskov Institute of Catalysis,Russian Academy of Sciences)

• Ядро РИНЦ (eLIBRARY.RU)