Skip to Main content Skip to Navigation
New interface
Preprints, Working Papers, ...

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

Abstract : 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.
Document type :
Preprints, Working Papers, ...
Complete list of metadata

https://hal-cnrs.archives-ouvertes.fr/hal-03484069
Contributor : Veronique Dupuis Connect in order to contact the contributor
Submitted on : Saturday, December 18, 2021 - 11:59:10 AM
Last modification on : Saturday, September 24, 2022 - 2:30:05 PM
Long-term archiving on: : Saturday, March 19, 2022 - 6:01:19 PM

File

ap210290.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-03484069, version 1

Collections

Citation

G Herrera, A Robert, Véronique Dupuis, N Blanchard, O Boisron, et al.. Chemical and magnetic order in mass-selected large FeRh nanomagnets embedded in a carbon matrix. 2021. ⟨hal-03484069⟩

Share

Metrics

Record views

55

Files downloads

35