Study of soft/hard bimagnetic CoFe2/CoFe2O4 nanocomposite

TL;DR

This study investigates the synthesis and magnetic properties of bimagnetic CoFe2/CoFe2O4 nanocomposites, revealing how thermal treatments affect their structure and magnetization, with potential implications for magnetic applications.

Contribution

It presents a novel experimental approach to synthesize and characterize CoFe2/CoFe2O4 nanocomposites, highlighting the effects of thermal processing on their magnetic properties.

Findings

X-ray diffraction and Mossbauer spectroscopy confirmed the formation of CoFe2/CoFe2O4.

Magnetic hysteresis measurements showed different saturation magnetizations.

High energy milling increased coercivity from 1.0 to 3.3 kOe.

Abstract

We report an experimental study of the bimagnetic nanocomposites CoFe2/CoFe2O4.The precursor material, CoFe2O4 was prepared using the conventional stoichiometric combustion method. The nanocomposite CoFe2/CoFe2O4 was obtained by total reduction of CoFe2O4 using a thermal treatment at 350oC in H2 atmospheres following a partial oxidation in O2 atmospheres at 380oC during 120; 30; 15, 10, and 5 min. The X-ray diffraction and Mossbauer spectroscopy confirmed the formation the material CoFe2/CoFe2O4 The magnetic hysteresis with different saturation magnetization confirms the formation of the CoFe2/CoFe2O4 with different content of CoFe2O4. The high energy milling to the precursor material increase the coercivity from 1.0 to 3.3 kOe, however the same effect was not observed to the CoFe2/CoFe2O4 material.