Electrical properties of ZnO:ZnAlO nanoparticle matrix composites

Zankat, Alpa; Boricha, Hetal; Shrimali, V.G.; Gadani, Keval; Sagapariya, Khushal; Rajyaguru, Bhargav; Gal, Manan; Pandya, D.D.; Solanki, P.S.; Shah, N.A.

doi:10.1016/j.jallcom.2019.02.274

Cited by 22 publications

(1 citation statement)

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“…In principle, the fundamental dielectric properties of ZnO -based compoundscould be tuned or even modified by doping with magnetic ions such as Co [10], or Mn [11], as well as non-magnetic ions such as Al [12], or Ga [13], tailored to specific requirements and applications [14]. Non-magnetic Al doping in ZnO can efficiently improve electronic properties ; it is also abundant, and is stable at high temperatures [15]. On the other hand, among the transition metal doping ions, manganese is considered a suitable element for improving and tuning the optical and electrical properties of ZnO [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mn-substitution on impedance spectroscopy and magnetic properties of Al-doped ZnO nanoparticles

Norouzzadeh

Golzan²,

Mabhouti³

et al. 2020

Nanotechnology

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In this study, the role of Mn-substitution on the structural, morphological, dielectric, and magnetic properties of Al-doped ZnO nanoparticles has been examined, using XRD, FE-SEM, µAutolab/FRA2 impedance spectroscopy, and vibrating sample magnetometer (VSM) techniques. Structural investigations revealed diffraction peaks consistent with JCPDS card No. 036-1451. Morphological evaluations of the synthesized nanoparticles indicated that the shape of the nanoparticles is a slightly hexagonal and generally spherical structure with a size range of approximately 10-70 nm. Dielectric measurements were performed in frequency ranges between 10 −3 Hz and 1 MHz. The results show that the sample's dielectric behavior is affected both by crystallite size and doping material type. In addition, it can be observed that the dielectric parameters exhibit extreme frequency dependence. Mn-substituted Al-doped ZnO is a suitable candidate for high-frequency applications due to its low dielectric loss at high frequencies. The AC conductivity of the Mn-substituted Al-doped ZnO sample increases with each frequency increment, and its value is higher than for the Al-doped ZnO sample, makings it a desirable material for use in device applications. Magnetic calculations, extracted from dielectric impedance spectroscopy measurements, are also investigated. Complex magnetic permeability, together with magnetic loss curves, are also plotted. Finallly, a study of the magnetic properties of the sample, using VSM, showed room-temperature ferromagnetic behavior.

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