Research articles
Exploring the magnetic properties and magnetic coupling in SrFe12O19/Co1-xZnxFe2O4 nanocomposites

https://doi.org/10.1016/j.jmmm.2021.168095Get rights and content
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Highlights

  • Sol-gel synthesis as a reliable way to design bi-magnetic hard-soft nanocomposites.

  • Tuning the magnetic anisotropy of the soft phase in an efficient way by elemental doping.

  • Strong magnetic coupling between the phases.

  • Developing exchange-coupled nanosystems.

Abstract

Among hard/soft nanocomposites (NCs), ferrite-based materials are potentially promising for developing exchange-coupled systems, thus leading to enhanced magnetic properties. In this regard, we investigate the role of the synthesis approach in the development of SrFe12O19/CoFe2O4 (SFO/CFO) NCs, with special focus on tuning the magnetic features of the softer phase (CFO) by introducing Zn2+ in the spinel structure. X-ray powder diffraction (XRPD), transmission electron microscopy (TEM) and squid magnetometry were employed to clarify the relationship between morphology, size, and magnetic properties of the NCs, pointing out the feasibility of this method in obtaining successfully exchange-coupled systems. This work shows how optimizing the intrinsic magnetic properties of the CFO may be used to tune the extrinsic ones of the NCs. Despite the promising results in magnetic coupling, our study clearly confirms/strengthens that an enhancement of remanent magnetization is the most important factor for improving the magnetic performance.

Keywords

Ferrites
Magnetic nanocomposites
Nanostructures

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