Influence of vanadium-doping on the magnetism of FeCo/SiO₂ nanoparticle

Abstract

FeCo nanoparticles (4 ± 1 nm), encapsulated by SiO2, were synthesized with and without a 2% (atomic ratio) vanadium doping. The impact from the presence of vanadium, an additive often used in the bulk to alter both physical and mechanical properties, on the nanomagnetism was probed by element-specific X-ray spectroscopy and magnetometry techniques. While the nanostructure was unaffected by the addition of 2% vanadium, the temperature dependent magnetic properties were altered significantly, such as the increased coercivity and an exchange bias field shift.

Magnetic Nanoparticle Composites: Synergistic Effects and Applications

“…The generation of a mixed interfacial layer of iron and cobalt metal silicates was noticed for both undoped and V‐doped composites. [ 126 ] A fast atom beam (FAB) sputtering technique has also been employed to co‐sputter Fe and Co foils along with a SiO 2 target in a high vacuum chamber. In this way, FeCo‐SiO 2 nanogranular composite films were deposited on a Si substrate.…”

Preparation and properties of pure crystalline perovskite CeFeO3 thin films with vanadium doping

“…In addition, vanadium is an element with variable valence. It provides possibilities to affect the magnetism of materials . The magnetism of perovskite ReFeO 3 comes from the superexchange of FeO 6 octahedron .…”