Synthesis and magneto-dielectric properties of Ti-doped Ni0.5Zn0.5TixFe2−xO4 ferrite via a conventional sol–gel process

IF 5.2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Advances Pub Date : 2024-10-30 DOI:10.1039/D4MA00529E
M. Farzana Alam, M. Atikur Rahman, Md. Sarowar Hossain, M. N. I. Khan, R. Rashid, M. Saiful Islam, William Ghann, M. K. Alam and Jamal Uddin
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Abstract

Ni–Zn-based ferrites (NZFO) need to possess the ideal ratio of dielectric and magnetic characteristics for uses involving electromagnetic fields. Consequently, the NZFO system has been modified by Ti4+ substitution at Fe3+ producing Ni0.5Zn0.5TixFe2−xO4 (x = 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10) and a conventional sol–gel process was followed for the synthesis. The structure of the synthesized samples was evaluated from the X-ray diffraction (XRD) patterns. Fourier transform infrared (FTIR) measurement provided information on chemical interaction with thermodynamic conditions. In addition, the grain sizes were obtained from scanning electron microscopy (SEM). Furthermore, the studied samples exhibit a notable light absorption in the visible spectrum with band gaps between 3.8 and 4.8 eV. The magneto-dielectric properties were analyzed by field (H) dependent magnetization (M), frequency-dependent permeability (μ), and permittivity (ε) measurements. Ti4+ substitution in NZFO led to a decrease in magnetic saturation (Ms) and μ while the values of creased and improved the mismatching impedance (Z/η0 = (μ′/ε′)1/2). The lowest value of Ms (14 emu g−1) is achieved for the sample with x = 0.1 for which μ is also the lowest. Finally, a stable value of Z/η0 (∼4.0) has been obtained for the x = 0.10 sample over a wide range of frequencies (1–10 MHz), making it suitable as a miniaturizing device material in this frequency range.

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通过传统溶胶-凝胶工艺合成掺 Ti- 的 Ni0.5Zn0.5TixFe2-xO4 铁氧体及其磁介质特性
镍锌基铁氧体(NZFO)需要具备理想的介电特性和磁特性比例,才能用于涉及电磁场的用途。因此,对 NZFO 体系进行了改良,用 Ti4+ 取代 Fe3+,生成了 Ni0.5Zn0.5TixFe2-xO4(x = 0.00、0.02、0.04、0.06、0.08 和 0.10),并采用传统的溶胶-凝胶工艺进行合成。通过 X 射线衍射(XRD)图对合成样品的结构进行了评估。傅立叶变换红外(FTIR)测量提供了化学作用与热力学条件的信息。此外,还通过扫描电子显微镜(SEM)获得了晶粒尺寸。此外,所研究的样品在可见光谱中有明显的光吸收现象,带隙在 3.8 至 4.8 eV 之间。通过磁场(H)相关磁化率(M)、频率相关磁导率(μ)和介电常数(ε)的测量,分析了样品的磁介电特性。在 NZFO 中取代 Ti4+ 会导致磁饱和度(Ms)和 μ 下降,而磁饱和度(Ms)和 μ 的值上升,并改善了错配阻抗(Z/η0 = (μ′/ε′)1/2)。在 x = 0.1 的样品中,Ms 值最低(14 emu g-1),μ 值也最低。最后,x = 0.10 的样品在很宽的频率范围(1-10 MHz)内都能获得稳定的 Z/η0 值(∼4.0),因此适合作为该频率范围内的微型器件材料。
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来源期刊
Materials Advances
Materials Advances MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
7.60
自引率
2.00%
发文量
665
审稿时长
5 weeks
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