作者: Nur Liyana Amiar Rodin , M.R. Sahar , F. Mohd-Noor
DOI: 10.1016/J.JMMM.2019.165931
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摘要: Abstract We report the cobalt oxide (Co3O4) nanoparticles (NPs) assisted modifications of magnetic properties melt-quench synthesized Er3+ doped sodium magnesium boro-tellurite glass. The changes in parameters are attributed to difference content Co3O4 NPs. XRD pattern confirmed amorphous nature newly glasses. Surface plasmon band NPs glass revealed two peaks which corresponded characteristic spinel-type phase and TEM images manifest occurrence non-spherical having an average diameter 6.02 ± 0.10 nm. Magnetic study using Vibrating Sample Magnetometer (VSM) paramagnetic behavior Co ion contributes by embedded lower value squareness ratio sample is stronger interactions among grains implying appearance isotropic behavior, hence, making them as a multi-domain with addition Electron Paramagnetic Resonance (EPR) spectra three prominent g factor at ranges 4.07–4.22, 2.97–3.02, 2.11–2.41. Furthermore, tetrahedral symmetry contribution increased inferred from oxidation states Co2+ ions probed EPR.