Pulsed Field-Induced Magnetization Switching in Antiferromagnetic Ferrihydrite Nanoparticles

Journal Article · Mon Oct 15 00:00:00 EDT 2018 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783418100025· OSTI ID:22770994

Krasikov, A. A.; Velikanov, D. A.; Popkov, S. I. ^[1]; Dubynin, N. V. ^[2]; Stolyar, S. V. ^[1]; Ladygina, V. P. ^[3]; Yaroslavtsev, R. N. ^[1]

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1. Russian Academy of Sciences, Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch (Russian Federation)
2. Moscow State University of Civil Engineering (Russian Federation)
3. Russian Academy of Sciences, Krasnoyarsk Scientific Center, Siberian Branch (Russian Federation)

The dynamic magnetization switching of ferrihydrite nanoparticles has been investigated by a pulsed magnetometer technique in maximum fields H{sub max} of up to 130 kOe with pulse lengths of 4, 8, and 16 ms. Ferrihydrite exhibits antiferromagnetic ordering and defects cause the uncompensated magnetic moment in nanoparticles; therefore, the behavior typical of magnetic nanoparticles is observed. The dynamic hysteresis loops measured under the above-mentioned conditions show that the use of pulsed fields significantly broadens the temperature region of existence of the magnetic hysteresis and the coercivity can be governed by varying the maximum field and pulse length. This behavior is resulted from the relaxation effects typical of conventional ferro- and ferrimagnetic nanoparticles and the features typical of antiferromagnetic nanoparticles.

• OSTI ID: 22770994
• Journal Information: Physics of the Solid State, Vol. 60, Issue 10; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ANTIFERROMAGNETISM
COERCIVE FORCE
DEFECTS
HYSTERESIS
MAGNETIC MOMENTS
MAGNETIZATION
MAGNETOMETERS
NANOPARTICLES
PULSES
RELAXATION