Electrical conduction in nanoceramic PGT synthesised by high energy ball milling

محورهای موضوعی : Journal of Theoretical and Applied Physics

SKS Parashar ¹ , Satyendra Narayan Singh ² , Mahmood Ghoranneviss ³ , Swarat Chaudhuri ⁴

1 - School of Applied Sciences, KIIT University
2 - Department of Physics, Ranchi University
3 - Plasma Physics Research Center, Islamic Azad University
4 - Department of Physics, St. Xavier' s College, Ranchi University

تاریخ پذیرش : 1392/09/10 تاریخ انتشار : 1392/09/10

کلید واژه: Nanocrystalline, High energy ball milling, Complex impedance spectroscopy, Activation energy, Correlated barrier hopping,

چکیده مقاله :

AbstractNanocrystalline Pb1–3x/2GdxTiO3 (where x = 0.01) abbreviated as PGT has been synthesised by high energy ball milling at room temperature. X-ray analysis shows that single-phase tetragonal structure of nanocrystalline PGT was formed after 15-h milling. The average crystallite size was found to be 17 nm. The frequency-dependent AC conductivity of the PGT ceramic was studied in the range 100°C to 525°C. Complex impedance analysis suggested the dielectric relaxation to be of non-Debye type. The activation energy was found to be 1.04 ev. The mechanism of charge transport in nanocrystalline PGT was successfully explained by correlated hopping model.