Issues »  Volume 11, Issue 2

Quantum and Structural-Dimensional Properties of Ferromagnetic Nanoparticles: Features of Nickel and Iron Cluster Systems

A. P. Shpak$^{1}$, A. B. Shevchenko$^{1}$, O. B. Mel’nyk$^{1}$, Yu. A. Kunyts’ky$^{2}$

$^1$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^2$Technical Centre, NAS of Ukraine, 13 Pokrovs’ka Str., 04070 Kyiv, Ukraine

Received: 01.04.2010. Download: PDF

The investigation formalism for magnetic properties of ferromagnetic nanoparticles (clusters) is elaborated. As revealed, the magnetic parameters of nanoparticles discontinue due to variation of their spatial atomic structure. The processes of thermoactivated and quantum relaxations of clusters magnetic moments are considered. As shown, by the variation of a magnitude of external magnetic field applied to the nanoparticles, one can vary magnetic quantum-fluctuation physical characteristics (crossover temperature, quantum-fluctuations rate, and magnetization reversal time) in a wide range.

Keywords: nanoparticle, f.c.c.-structure, icosahedral structure, magnetic moment, magnetic relaxation, superpair- and ferromagnetism, crossover temperature, quantum fluctuations.

PACS: 61.46.Bc, 61.50.Lt, 75.20.En, 75.30.Cr, 75.30.Gw, 75.45.+j, 75.75.-c

DOI: https://doi.org/10.15407/ufm.11.02.139

Citation: A. P. Shpak, A. B. Shevchenko, O. B. Mel’nyk, and Yu. A. Kunyts’ky, Quantum and Structural-Dimensional Properties of Ferromagnetic Nanoparticles: Features of Nickel and Iron Cluster Systems, Usp. Fiz. Met., 11, No. 2: 139—173 (2010) (in Russian), doi: 10.15407/ufm.11.02.139

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