Structural and Magnetic Properties Study of Fe2O3/NiO/Ni2FeO4 Nanocomposites

Abstract

In the current work, the nanocomposites that consist chiefly of three components—α-Fe2O3, NiO and Ni2FeO4, in two different ratios 2:2:1 (FNN-221) and 2:1:1 (FNN-211), respectively—were produced. The synthesis was done in two steps by following the chemical co-precipitation and mechanical ball-milling route. The presence of individual phase was identified from the XRD data without the detection of any additional impurities. The phase fraction of each component estimated from the profile fitting of XRD patterns were found to be 41.2%, 39.7%, 19.1% in FNN-221 sample and 49.5%, 26.4%, 24.1% for FNN-211 sample, respectively, which were consistent with the experimental values. The total magnetization at 300 K was obtained to be 13.41 emu/g and 10.95 emu/g for FNN-221 and FNN-211 samples, respectively. In FNN-211 compound the zero field coercivity (HC) expanded towards the higher field values thereby signifying the exchange bias behavior. Furthermore, the exchange bias field (Hex) for FNN-211 was obtained as 35.1 Oe.

Effect of annealing duration on the structural, optical and magnetic properties of NiO/NiFe2O4 nanocomposites

“…In recent years, there has been a surge of interest in composite nanomaterials because of the synergistic effect and size reduction induced enhancement of several properties that find usefulness in various applications [1][2][3]. Remya et al [4] reported the enhancement of the electrical and magnetic properties of BiFeO 3 /MnFe 2 O 4 NCs.…”

“…The CoFe 2 O 4 /PVA-SiO 2 NCs are shown to be useful in magnetic and photocatalytic applications [7]. Among several NCs, the multi-phasic magnetic nanoparticles have attracted profound attention among researchers as the magnetic properties of such materials are intensely connected with the contact between differently ordered magnetic phases along with the interfacial interactions [3,8]. As the properties can be tailored via manipulating synthesis conditions [9], chemical compositions and phase fractions of components [3,4,10,11], magnetic NCs find applications in energy storage devices [12], spintronic devices [13], magnetic contrast agent [14], catalyst [15], high-density magnetic storage media [16], Li-ion batteries [17,18], drug delivery [6], permanents magnets [19][20][21], etc.…”

“…Among several NCs, the multi-phasic magnetic nanoparticles have attracted profound attention among researchers as the magnetic properties of such materials are intensely connected with the contact between differently ordered magnetic phases along with the interfacial interactions [3,8]. As the properties can be tailored via manipulating synthesis conditions [9], chemical compositions and phase fractions of components [3,4,10,11], magnetic NCs find applications in energy storage devices [12], spintronic devices [13], magnetic contrast agent [14], catalyst [15], high-density magnetic storage media [16], Li-ion batteries [17,18], drug delivery [6], permanents magnets [19][20][21], etc. Particularly bimagnetic NCs having ferromagnetic (FM)/AFM or ferrimagnetic (FIM)/AFM phases have been exploited for achievable applications such as hypothermia treatment [22], spin valve [23,24], ultrahigh-density recording heads [25], tunnel junction [26], sensing device [27], magnetic memory element [28], etc.…”

The Synthesis of porous indium phosphide with nickel oxide crystallites on the surface

“…[17,18]. Nickel oxide nanostructures, in particular nanotubes, nanoparticles and nanowires, offer even a greater value [19].…”

Formation of CdO/CdS/textured-ZnO/ZnO heterostructures by chemical deposition

“…Metal oxides have been the subject of many studies due to their excellent photocatalytic properties. TiO2 [1,2], NiO [3,4], Ga2O3 [5,6], MgO [7,8], CdO [9,10], etc. semiconductors are widely studied.…”