التفاصيل البيبلوغرافية
| العنوان: |
Structural, Magnetic and Optical Analysis of Pb2+- and Ce3+-Doped Strontium Hexaferrite. |
| المؤلفون: |
Jayakumar, T.1 (AUTHOR), Raja, C. Ramachandra1 (AUTHOR) crrajaphy@gmail.com, Arumugam, S.2 (AUTHOR) |
| المصدر: |
Journal of Superconductivity & Novel Magnetism. Aug2020, Vol. 33 Issue 8, p2451-2458. 8p. |
| مصطلحات موضوعية: |
*BAND gaps, *STRONTIUM, *SCANNING electron microscopy, *CONDUCTION bands, *CHEMICAL formulas |
| مستخلص: |
M-type strontium hexaferrite with chemical formula Sr1-xPbxFe12-yCeyO19 (x = 0.0, 0.1, 0.2, 0.3 and y = 0.0, 0.2, 0.4, 0.6) was prepared by sol-gel auto combustion approach. All the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis-NIR spectroscopy, Raman spectroscopy and vibrating sample magnetometer (VSM) at room temperature. The XRD pattern shows that all samples exhibit single phase hexagonal phase without any secondary phase. The size of the crystallites was in the 77–90 nm range. The SEM micrographs show agglomerated particles. Raman spectral analysis reveals the presence of prominent peaks of Fe-O bonds. The band gap was calculated, and it decreased from 2.08 eV to 1.83 eV. The reduced band gap value maybe the result of some lattice strain, crystallite size and minor impurity caused by continuous band of sub-bands developed in the conduction band. The VSM results show the behaviours of saturation magnetization (Ms), retentivity magnetization (Mr) and coercivity (Hc). The Ms, Mr and Hc values decrease with increase in the Ce/Pb concentration. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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