Magnetic relaxation in a suspension of antiferromagnetic nanoparticles
- Russian Academy of Sciences, Ural Division, Institute of Continuous Media Mechanics (Russian Federation)
A kinetic model is proposed to describe the low-frequency magnetodynamics of antiferromagnetic nanoparticles suspended in a fluid. Because of their small size, apart from an anisotropic magnetic susceptibility typical of antiferromagnets, these particles also have a constant magnetic moment caused by sublattice decompensation. An orientational crossover takes place in such a nanosuspension (colloid) when magnetized by a constant field: the axes of easy particle magnetization that were initially aligned along the field become oriented perpendicularly. This effect changes significantly the characteristics of the system's magnetic response: the dynamic susceptibility spectrum and the relaxation time in a pulsed field.
- OSTI ID:
- 21244153
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 107, Issue 3; Other Information: DOI: 10.1134/S1063776108090112; Copyright (c) 2008 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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