Electrical transport properties of V2O5-added Ni–Co–Zn ferrites

Journal of Advanced Dielectrics

卷:11

M. A. Hakim¹  F. A. Khan²  Sm. Rubayatul Islam²  Faizus Salehin²  M. Samir Ullah²  M. Firoz Uddin²  A. A. Momin³  S. Manjura Hoque⁴ 

[1] Department of Glass and Ceramic Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh;

[2] Department of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh;

[3] Department of Physics, Jagannath University, Dhaka 1100, Bangladesh;

[4] Materials Science Division, Atomic Energy Center, Dhaka 1000, Bangladesh;

关键词: Dielectric constant;    electrical resistivity;    AC conductivity;    complex impedance;    Cole–Cole plot;   

DOI  :  10.1142/S2010135X21500259

来源: DOAJ

【 摘 要 】

Frequency-dependent dielectric constant, dielectric loss, AC conductivity values and complex impedance spectra of V2O5-added Ni–Co–Zn ferrites ([Formula: see text][Formula: see text][Formula: see text]Fe2[Formula: see text] [Formula: see text]V2O5, where [Formula: see text] 0, 0.5, 1 and 1.5 wt.%) have been investigated at room temperature. The dielectric properties of the samples follow the Maxwell–Wagner polarization model. An inverse relationship was found between dielectric constant and AC electrical resistivity for all the samples. The dielectric constants decreased with the addition of V2O5, while the electrical resistivities of V2O5-added Ni–Co–Zn ferrites are found to be larger than that of pure Ni–Co–Zn ferrite. The AC conductivity was reduced with the addition of V2[Formula: see text]to Ni–Co–Zn ferrite at lower-frequency region. However, AC conductivity shows a sharp increase at higher-frequency region, which could be attributed to the enhancement of electron hopping between the Fe[Formula: see text] and Fe[Formula: see text] ions in the ferrite matrix due to the activity of the grains. The complex impedance spectroscopy results through Cole–Cole/Nyquist plot have demonstrated a single semicircular arc. It indicates that conduction mechanism takes place predominantly through the grain/bulk property, which could be ascribed to the larger grain size of V2O5-added Ni–Co–Zn ferrites.

【 授权许可】

Unknown