Namrata Pattanayak

6 Questions 9 Answers 0 Followers

Questions related from Namrata Pattanayak

How to estimate magnetic domain size using Gwydion program?

Dear researchers, I am new to Gwydion program and also new to magnetic domain size estimation from the MFM images. I would appreciate if you could teach a beginner like me using Gwydion to...

27 January 2025 3,422 0 View

Is it true that dopants with bigger ionic radii always leads to increase in lattice parameters?

MY sample is iron oxide doped with Zn and the lattice parameters I have determined from the Rietveld analysis. While the ionic radius of Zn is more than Fe, I found that compare to pristine...

12 July 2023 6,021 2 View

What information one can get from single crystal XRD with four circle diffractometer which one can not obtain from the powder XRD ?

In order to analyze the detail crystal structure including bond angle, bond length, lattice parameters, wickoff positions, thermal parameters, unit cell information etc. powder XRD followed by...

28 October 2021 6,986 6 View

Al doped alpha-Fe2O3 synthesis detail is attached herewith. Help me to evaluate the value of 'x' in the final product alpha- Fe2-x Alx O3 ?

I have tried doping Al in the alpha-Fe2O3 compound using wet chemical synthesis route. The synthesis procedure with precursor details is attached herewith. Please help me to evaluate the value of...

19 May 2021 6,252 3 View

I have a doubt regarding the origin of weak ferromagnetism in alpha-Fe2O3 and why it vanishes just below its Morin transition.

I have read already Dzyallonskii's paper as well Moriyas paper which is the two basic paper discussed and derived the reason of spin canting. However, I am finding it difficult to understand. I do...

22 May 2017 10,026 1 View

Can the anisotropic debye waller factors be negative?? Can one use it for the refinement of the synchrotron xrd data??

I am refining the room temperature synchrotron xrd of alpha -Fe2O3. The chi square I got is 3.14 and the lowering of chi square is only possible if I use anisotropic displacement parameter. After...

09 July 2016 8,841 7 View