Electrical and Optical Study of Dy doped Bismuth Layer SrBi2Ta2O9(SBT)

Sahu, Rakesh Kumar (2013) Electrical and Optical Study of Dy doped Bismuth Layer SrBi2Ta2O9(SBT). MSc thesis.



The two layer Aurivillius compound SrBi2Ta2O9 (SBT) and SrBi2-xDyxTa2O9 (x=0.025, 0.05, 0.1) was synthesized by using a solid state sintering method. The X-ray diffraction (XRD) analysis revealed that the dysprosium substituted ceramic SrBi2Ta2O9 have a pure two-layer Aurivillius type structure. The effects of Dysprosium oxide on the microstructure, ferroelectric, dielectric and optical properties of the ceramics were investigated. Dy doping is found to be significantly affect on the structural and physical properties of SBT. The dielectric constant (Ԑ) and transition temperature (Tc) of Dy-doped samples was found to be decrease with increase of Dy content. Well-developed P (polarization)-E (Electric field) hysteresis loops were observed for all the samples and also the band-gap (Eg) of this sample was verify by UV-VIS spectrophotometer.

Item Type:Thesis ( MSc)
Uncontrolled Keywords:Dielectrics;Ferroelectrics;Bismuth Layer Ferroelectrics;Relaxor Ferroelectrics;XRD,SEM,UV,Dielectric,P-E loop analysis of SBT and SBTDy.
Subjects:Physics > Condensed Matter
Divisions: Sciences > Department of Physics
ID Code:4914
Deposited By:Hemanta Biswal
Deposited On:06 Nov 2013 14:03
Last Modified:20 Dec 2013 12:00
Supervisor(s):Panigrahi, S

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