Hasan Muhammad Usama

4 Questions 8 Answers 0 Followers

Questions related from Hasan Muhammad Usama

Which conduction mechanism yields a straight line in log J vs E plot?

The material is Bi0.8La0.2FeO3 in pellet form with silver paste on both sides as electrodes. Above a certain applied field the (log J) vs E curve shows a distinct linear region as shown in the...

08 August 2017 2,191 4 View

What could be the reason behind this discontinuity in UV-Vis spectra?

As you can see there are two clear discontinuities in the F(R) vs Energy spectra which is surely not an effect intrinsic to the sample. Spectra was obtained in Diffuse reflectance mode using a...

12 December 2016 1,494 4 View

What could be the reason for observing negative dielectric constant near 10^5 to 10^6 Hz in La-substituted (20%) Bismuth Ferrite?

Dielectric constant was measured in sintered pellets of the compound with silver paste as electrodes using a Wayne-Kerr impedance analyzer. Note that the tan d peaks correspond to the points where...

07 July 2016 2,677 4 View

Intensity mismatch in Rietveld refinement of BiFeO3 based compounds using FullProf. How can I improve the fit?

I am just starting out with rietveld refinement. I have been trying to get a good fit for my data of the compounds Bi0.8La0.2Fe(1-x)Zrx using the software Fullprof. But in all my 4 compositions...

07 July 2016 2,359 3 View