Anisotropy evolution of nanoparticles under annealing: Benefits of isothermal remanent magnetization simulation

Tournus, Florent; Tamion, Alexandre; Hillion, Arnaud; Dupuis, V.

doi:10.1016/j.jmmm.2016.06.005

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…dM IRM (H)/dH, Figure S5) represents the irreversible component of the susceptibility. This quantity can be considered as a measure of the energy barriers distribution, which, in a nanoparticle system, is associated with the switching field distribution (SFD) [68,69]. The field, corresponding to the mean SFD value, is called remanece coercivity (H cr ) and it represents the coercive field of the particles in the blocked state, which are responsible for the irreversible part of the magnetization.…”

Section: Magnetic Inter-and Intraparticle Interactionsmentioning

confidence: 99%

Interplay between inter- and intraparticle interactions in bi-magnetic core/shell nanoparticles

et al. 2021

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Section: Magnetic Inter-and Intraparticle Interactionsmentioning

confidence: 99%

Interplay between inter- and intraparticle interactions in bi-magnetic core/shell nanoparticles

et al. 2021

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Quantification of the Interaction Field in Arrays of Magnetic Nanowires from the Remanence Curves

Araujo

Martínez-Huerta

Piraux

et al. 2018

J Supercond Nov Magn

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Chemical and magnetic order in mass-selected large FeRh nanomagnets embedded in a carbon matrix

Herrera

Robert

Dupuis

et al. 2022

Eur. Phys. J. Appl. Phys.

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In this paper, we present some specific chemical and magnetic order results obtained on bimetallic FeRh nanoparticles prepared under non-equilibrium conditions using mass-selected Low Energy Cluster Beam Deposition. Clusters around 7 nm incident diameter are in-situ sandwiched between amorphous carbon films before transfer in air, with different surface coverage (from nearly isolated particles to percolating 2D films) in order to artificially increase diameters of the nanoparticles (NPs) by coalescence. On such FeRh@C samples, we observe different NPs morphologies and magnetic responses after UHV thermal treatments. By transmission electron microscopy (TEM), we show that after moderate annealing, nanoalloys evolved from a metastable structure towards the equilibrium CsCl-type (B2) chemically ordered phase with a more spherical shape. While from Superconducting Quantum Interference Device (SQUID) magnetometry measurements on 700 °C-annealed FeRh@C samples, we clearly evidence huge magnetization enhancement for such B2 nanoalloys with robust ferromagnetic (FM) signature even at very low temperature unlike their bulk counterparts.

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Anisotropy evolution of nanoparticles under annealing: Benefits of isothermal remanent magnetization simulation

Cited by 4 publications

References 33 publications

Interplay between inter- and intraparticle interactions in bi-magnetic core/shell nanoparticles

Interplay between inter- and intraparticle interactions in bi-magnetic core/shell nanoparticles

Quantification of the Interaction Field in Arrays of Magnetic Nanowires from the Remanence Curves

Chemical and magnetic order in mass-selected large FeRh nanomagnets embedded in a carbon matrix

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