Abstract

In the present study, a heterostructure of Ni doped M-type hexaferrite i.e., BaNi_0.2Fe_11.8O₁₉ (BNFO) and reduced graphene oxide (RGO) has been prepared to understand its effect on the optical and magnetic properties of BNFO. Here, the preparation of both the components was carried out through sol–gel (followed by heat treatment) and modified Hummer’s method, respectively. The confirmation of phase formation was confirmed with XRD results and spectroscopic techniques (FTIR and Raman) were used to monitor the structural variation occurred as a result of attachment of BNFO and RGO. Further, vibrating sample magnetometry (VSM) and absorbance spectroscopy (UV–visible) were carried out to understand the effect of attachment. VSM study suggested the decrement of saturation magnetization, coercivity, and retentivity as a result of RGO addition in BNFO which might be associated to the soft magnetic characteristics of RGO. While, such synergistic heterojunction induced excellent visible absorption of prepared samples enabling its applicability in optical devices.

中文翻译：

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还原氧化石墨烯（RGO）诱导的M型掺杂镍的六价钡铁氧体光学和磁性性质的改性

摘要

在本研究中，Ni掺杂的M型六方铁氧体即BaNi _0.2 Fe _11.8 O ₁₉的异质结构（BNFO）和还原氧化石墨烯（RGO）已准备好了解其对BNFO光学和磁性的影响。在这里，两种成分的制备分别通过溶胶-凝胶法（随后进行热处理）和改进的悍马方法进行。XRD结果证实了相形成的确认，并使用了光谱技术（FTIR和Raman）来监测由于BNFO和RGO的附着而发生的结构变化。此外，还进行了振动样品磁力分析（VSM）和吸光度光谱分析（UV-visible），以了解附着效果。VSM研究表明，由于在BNFO中添加RGO，饱和磁化强度，矫顽力和保持性会降低，这可能与RGO的软磁特性有关。而，