Sometimes I don't get FWHM in nilfitpeaks chart after peak fitting using gaussian or Lorentz profile. What could be the reason? But when I use Gauss profile FWHM is shown in nilfitpeaks chart. My samples are mostly semicrystalline. Your videos were of great help in my project. Many thanks. Keep uploading such tutorials.
Thank you for this video. please if someone have another material present in the primary material you are working on. Am I going to consider both primary peaks and secondary peaks or primary peaks alone?
First of all thank you for your sharing. i want to ask related W-H method. when we fit curvefitting if r^2 value far from 1 what we do to fix this? Some peaks maybe subtract?
Sir since adjacent r square value is not near to 1..its a bad fit...so will it be correct...to conclude the result without making adjacent r square to value as 1
Hi, thanks for the video. I have a question. The angle used for calculation was not divided by 2. I am not sure if I understand it wrongly or is there any mistake.
Scherer equation is a rough theoretical estimation while W-H plot is more accurate. Because W-H plot separate micro strain from the grain size while this value is embedded is Scherer equation.
Thanks a lot for the tutorial, but I got a question to ask: Is it possible to have slope approximate to zero which means that there’s no strain in the material or the stress has been released causing no strain?
Brother, i got crystalline size different in both methods, what is the reason behind different crystalline size in debye Scherrer and W-H method ? ..thnx
off course it will different. Scherer equation is a rough theoretical estimation while W-H plot is more accurate. Because W-H plot separate micro strain from the grain size while this value is embedded is Scherer euation.
thanks a lot , but when i calculate crystallites size, i have a problem in the unit value. when i use lamda as unit of Å, that time it was correct to compare to SEM. why?
You modify the equation to give you a line. \beta_T vs \theta relation is clearly non-linear. But \beta_T*\cos\theta vs \sin\theta relation is so. Therefore, you firstly create the latter plot, then apply linear fit, which works well.
\beta_T is the total broadening in this video. In earlier videos he does not take into account \beta_\epsilon, so \beta_D is FWHM there. But here, there are two contributions to FWHM (=\beta_T). In other models there maybe more terms contributiong to FWHM.
your analysis is wrong because adj. R square value should come close to 1 , even at 0.8 to 0.9 is okay. you have to mask certain data points and fit the data, changing scale wont help.
Amazing and helpful for all the researchers i am proud to follow you
Very informative thank you, it helps in my dissertation project for catalyst analysis thank you once again
Great to hear!
Thank you so much, but I find negative slope, is it normal?
Sometimes I don't get FWHM in nilfitpeaks chart after peak fitting using gaussian or Lorentz profile. What could be the reason? But when I use Gauss profile FWHM is shown in nilfitpeaks chart. My samples are mostly semicrystalline. Your videos were of great help in my project. Many thanks. Keep uploading such tutorials.
My strain ended being a negative slope. Was there something wrong?
It was a very helpful and detailed video for those who are working on this topic. Thank you so much!
Glad it was helpful!
Glad it was helpful!
Glad it was helpful!
No words to say amazing PPT point to point explanation... Thanks a lot..
Thanks and welcome
May Almighty gives you the best reward for this work, really helpful.
Sir, can I get this word file that u used to explain?
Thanks a Lot sir, great have no words, lots of thanks, hope to make more viedio on other parameters, obtained on XRD and characterization methods
Thank you very much for your detailed information
i am getting negative intercept , what to do? please help me out..
Could you please tell how to obtain a modified W-H plot from XRD peaks?
indeed a simple and informative.thanks a lot.
Glad it was helpful!
Very good and informative Video, keep the work up! :)
Thank you for this video. please if someone have another material present in the primary material you are working on. Am I going to consider both primary peaks and secondary peaks or primary peaks alone?
First of all thank you for your sharing. i want to ask related W-H method. when we fit curvefitting if r^2 value far from 1 what we do to fix this? Some peaks maybe subtract?
Thank you for the amazing video. For my some XRD data there is a problem ( Fit did not converge) appears. why it happens?
either the data required a baseline correction or smoothing.
Do Not Select low intensities Peaks
You did not divided the angle @ FWHM convertion to Radians @ 15.40. Is that ok. Can you clarify me?
Thank you so much, it was really helpful 👍
Glad to hear that!
Thanks a lot for this great job, please continue
Sir since adjacent r square value is not near to 1..its a bad fit...so will it be correct...to conclude the result without making adjacent r square to value as 1
thank you for this great video. helped me a lot.
Good video.. really helpful
Thanks a lot very easily explained
I love your videos
well done. you made it very easy. thanks a lot, I hope to continue to share more and more videos...
Hi, thanks for the video. I have a question. The angle used for calculation was not divided by 2. I am not sure if I understand it wrongly or is there any mistake.
I have divided it, please watch it again from 13:35 to 13:48
@@nanoworld6122 Sir can you explain why u neglected the error in the microstrain ?
From where to get correlation coefficient values (R2) ?
great as always
Very interesting and knowledgeable video. Thank you, Sir.
sir/madam can you define what is microstrain?
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I follow the same step but after fitting the peaks the data doesn't give the FWHM value.... Others are same... How can i take my FWHM value..?
This is because, you performed the fitting using Gaussian instead of Guss
@@nanoworld6122 thanks for the reply..
Very usefull information sir. But there is any possible to plot other three methods also halder Wagner plot
appreciated help for students. can you please teach us how to calculate dislocation density in XRD. Edge and screw dislocation
How do you account for instrumental broadening in this equation?
Thank you so much!! It was really helpful..
sir how to calculate lattice parameter of composite film with different concentrations of doping
it is very helpfull to me. thanks you ..
Happy to help
Can you explain to me why Williamson-Hall more accurate than scherrer method. What the advantages of using Williamsoh-Hall method I mean
Scherer equation is a rough theoretical estimation while W-H plot is more accurate. Because W-H plot separate micro strain from the grain size while this value is embedded is Scherer equation.
Thanks a lot for the tutorial, but I got a question to ask:
Is it possible to have slope approximate to zero which means that there’s no strain in the material or the stress has been released causing no strain?
Excellent sir and Thanks a lot sir 🙏🙏🙏🙏
help! i have been getting Fit did not converge - mutual dependency exists between parameters error
Brother, i got crystalline size different in both methods, what is the reason behind different crystalline size in debye Scherrer and W-H method ? ..thnx
off course it will different.
Scherer equation is a rough theoretical estimation while W-H plot is more accurate. Because W-H plot separate micro strain from the grain size while this value is embedded is Scherer euation.
sir please explain how to calculate mass fractions of aplha and beta phase in titanium aaloy from xrd data
Sir, if there is a secondary phase in the XRD peaks, should we include the secondary peaks' information when calculating the FWHM?
Is it possible to use X'Pert high score for calculation of cristalline size and strain through this method W-H? Thanks
Thanks,V nice ,easy method
Thanks for the detailed demo for calculating crystallite size. Can you comment on the value of the strain and the information obtained from it?
thanks a lot , but when i calculate crystallites size, i have a problem in the unit value. when i use lamda as unit of Å, that time it was correct to compare to SEM. why?
you are probably doing something wrong
@@nanoworld6122 thanks for your attention.
Respected Sir,. How much variation is acceptable between the calculated value of crystallite size by WH plot method and modified schrrer method?
did you got the answer? i got 35 nm from scherrer and 120 nm from wh plot..
What if standard data is not available
i want a pdf file of xrd.
When we plot in polynomial fit, which is taken as slop
Nice job
brilliant job (y)
i need the excel fil
Just Respect
sir, the crystallite size we get from W-H plot is it the average crystallite size?
Yes
What is meant by linear fit...why polynomial fit is not used
You modify the equation to give you a line. \beta_T vs \theta relation is clearly non-linear. But \beta_T*\cos\theta vs \sin\theta relation is so. Therefore, you firstly create the latter plot, then apply linear fit, which works well.
hey man
in my xdr data i obtained (Intercept -0,0028 ± 0,00891)
is that possible?
how can i calculate the crystal size ?
There is a lot of explanatory material available on research-gate regarding negative W-H plot.
The unit of fwhm should be radian
Very nice 👍👌
Thank you very much
evry useful. can you please send me the typed derivation shown in the video..thank you
Ask it through email
Many thanks
You are welcome
You are telling βT = FWHM and also βD = FWHM, why?
yes, I have the same doubt. is it same or what??
\beta_T is the total broadening in this video. In earlier videos he does not take into account \beta_\epsilon, so \beta_D is FWHM there. But here, there are two contributions to FWHM (=\beta_T). In other models there maybe more terms contributiong to FWHM.
Excellent..
Thanks a lot
thanks sir,,,,,,,,,,
Thanks can you plz send me the word file
nice
your analysis is wrong because adj. R square value should come close to 1 , even at 0.8 to 0.9 is okay. you have to mask certain data points and fit the data, changing scale wont help.