二氧化硅封装磁性镍纳米颗粒的介电行为

Global Journal of Novel Research in Applied Sciences (NRAS) [ISSN: 2583-4487] Pub Date : 2022-06-20 DOI:10.58260/j.nras.2202.0104

M.Radha

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引用次数: 0

摘要

阻抗测量结果显示活化能为1.3 eV，直流电导率随温度升高而降低。宽频率范围内的高介电常数被解释为Ni浓度远高于渗透阈值的结果。导电机制主要是低频隧穿和高频电子跳变。该材料在高频范围内损耗低，适用于高频磁应用。

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DIELECTRIC BEHAVIOUR OF MAGNETIC NICKEL NANOPARTICLES ENCAPSULATED IN SILICA

The impedance measurement showed activation energy of 1.3 eV and decrease in dc conductivity with temperature. The high dielectric constant over a wide frequency range is explained as a consequence of concentration of Ni much higher than the percolation threshold. The conductivity mechanism is dominated by tunneling at low frequency and electron hopping at high frequencies. The material suffers a low loss in high frequency range, making it suitable for high frequency magnetic applications.

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Global Journal of Novel Research in Applied Sciences (NRAS) [ISSN: 2583-4487]

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