Magnetization reversal in particulate L10 nanostructures

Magnetization reversal in particulate L10 nanostructures

Magnetization processes in particulate L10 FePt nanostructures are investigated by model calculations and numerical simulations. The systems considered include anisotropic nanograins embedded in non-magnetic matrix; randomly oriented nanoclusters embedded in a C matrix, and nanocomposites of FePt pa...

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Veröffentlicht in:Scripta materialia 2005-08, Vol.53 (4), p.453-456
Hauptverfasser: ZHOU, J, SKOMSKI, R, SORGE, K. D, SELLMYER, D. J
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Applied sciences
Exact sciences and technology
Metals. Metallurgy
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container_title Scripta materialia
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creator ZHOU, J
SKOMSKI, R
SORGE, K. D
SELLMYER, D. J
description Magnetization processes in particulate L10 FePt nanostructures are investigated by model calculations and numerical simulations. The systems considered include anisotropic nanograins embedded in non-magnetic matrix; randomly oriented nanoclusters embedded in a C matrix, and nanocomposites of FePt particles in a semi-hard matrix. The reversal mechanisms depend on both intra- and intergranular features. Quasi-coherent rotation dominates the reversal in weakly-coupled granular magnets, but interface imperfections yield a disproportionately strong coercivity reduction. Strong intergranular exchange leads to a transition to a discrete pinning regime, which is accompanied by a coercivity maximum.
doi_str_mv 10.1016/j.scriptamat.2005.04.035
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subjects Applied sciences
Exact sciences and technology
Metals. Metallurgy
title Magnetization reversal in particulate L10 nanostructures
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