Venkateswara Rao Mannepalli

7 Questions 17 Answers 0 Followers

Questions related from Venkateswara Rao Mannepalli

Can any suggest a simple way or technique to calculate the oxygen stoichiometry in ABO3 perovskite

I just want to know the 'd ' value in ABO3-d.

06 November 2014 7,133 5 View

Can anyone tell possible orthorhombic transformations (Pnma to any other noncentrosymmetric space group in same structure)?

Please explain possible structural transitions (one space group to the other) in orthorhombic structure.

23 August 2014 9,511 0 View

Is there any compound in ferroelectrics or multiferroics whose capacitance is greater than nF?

Usually greater capictence(>pF) is related to grainboundaries or interfacial polarisation.

16 August 2014 2,333 4 View

Does doping in the A or B site of ABO3 pervoskite create the chemical pressure inside the system?

Please explain how one can calculate the chemical pressure of a system. Are the chemical pressure and applied external pressures equivalent?

26 July 2014 5,095 3 View

Is there any possibility that DSC transition (only heating run but i didnt observe any transition while cooling) is related to structural transition?

our dielectric transition is relaxor vary with freqency with temperature.

17 July 2014 5,756 4 View

Is it compulsory that dielectric transition is involved with change in symmetries or with structural change or both?

What I mean in change of symmetries is non centrosymmetry to centrosymmetry within the same structure or different structure. What I mean about structural change is centrosymmetric structure (eg...

24 April 2014 9,120 1 View

What is the reason for a negative dielectric loss at higher temperatures?

Negative dielectric loss was observed in the sample at higher temperatures for all frequencies. Dielectric constant has a sharp anomaly before this temperature and we did not observe any negative...

21 April 2014 3,193 5 View