Cubic chemically ordered FeRh and FeCo nanomagnets prepared by mass-selected low-energy cluster-beam deposition: a comparative study - Archive ouverte HAL Access content directly
Journal Articles Beilstein Journal of Nanotechnology Year : 2016

Cubic chemically ordered FeRh and FeCo nanomagnets prepared by mass-selected low-energy cluster-beam deposition: a comparative study

Abstract

Near the point of equiatomic composition, both FeRh and FeCo bulk alloys exhibit a CsCl-type (B2) chemically ordered phase that is related to specific magnetic properties, namely a metamagnetic anti-ferromagnetic/ferromagnetic transition near room temperature for FeRh and a huge magnetic moment for the FeCo soft alloy. In this paper, we present the magnetic and structural properties of nanoparticles of less than 5 nm diameter embedded in an inert carbon matrix prepared by mass-selected low-energy cluster-beam deposition technique. We obtained a CsCl-type (B2) chemically ordered phase for annealed nanoalloys. Using different experimental measurements, we show how decreasing the size affects the magnetic properties. FeRh nanoparticles keep the ferromagnetic order at low temperature due to surface relaxation affecting the cell parameter. In the case of FeCo clusters, the environment drastically affects the intrinsic properties of this system by reducing the magnetization in comparison to the bulk.
Fichier principal
Vignette du fichier
2190-4286-7-177.pdf (7.15 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-01957901 , version 1 (25-01-2021)

Identifiers

Cite

Véronique Dupuis, Anthony Robert, Arnaud Hillion, Ghassan Khadra, Nils Blanc, et al.. Cubic chemically ordered FeRh and FeCo nanomagnets prepared by mass-selected low-energy cluster-beam deposition: a comparative study. Beilstein Journal of Nanotechnology, 2016, 7, pp.1850-1860. ⟨10.3762/bjnano.7.177⟩. ⟨hal-01957901⟩
81 View
32 Download

Altmetric

Share

Gmail Facebook X LinkedIn More