期刊
CERAMICS INTERNATIONAL
卷 48, 期 14, 页码 20418-20425出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.03.327
关键词
TiO2; CoFe2O4; XRD; Diffused reflectance; VSM
Magneto-optical TiO2/xCoFe(2)O(4) nanocomposites with various concentrations of CoFe2O4 were prepared using mechanical mixing. These nanocomposites exhibited ferromagnetic characteristics and their magnetic parameters were influenced by the percentage of CoFe2O4 in the composites.
Magneto-optical TiO2/xCoFe(2)O(4 )nanocomposites having various concentrations of CoFe2O4 (x = 2, 4 and 6 wt %) were prepared using facile mechanical mixing. X-ray diffraction was employed for the phase examination and microstructure parameters. X-ray diffraction spectra proved the formation of two separate phases: tetragonal titanium dioxide (TiO2) and face-centered cubic cobalt iron oxide. The structure was further verified by recognizing the selected area electron diffraction (SAED) pattern recorded by a high-resolution transmission microscope. The optical investigation of the prepared nanocomposites verified that the optical band gap values varied from 3.1 eV for pure TiO2 to 3.05 eV for TiO2/CoFe2O4 (6 wt %). The refractive index, optical dielectric constant and loss factor were discussed in detail. The nanocomposites (TiO2/xCoFe(2)O(4)) demonstrated ferromagnetic characteristics and their magnetic parameters were affected by the CoFe(2)O(4 )percentage in the composites. The sample x = 2 wt % depicted the maximum magnetic exchange bias at room temperature. Moreover, it showed maximum coercivity (HC) and magnetic squareness ratio (SQ), which makes it suitable for spintronic applications.
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