EasySpin forum

Hej!

I have been using the Exp.SampleRotation method of the development version 6 of easyspin. Some changes between versions dev.37 and dev.48 seem to have broken this method. (Is there a change log publicly available for the dev versions?)

Is it save to replace SampleRotation by using the rotateframe function like here: https://github.com/StollLab/EasySpin/bl ... rotation.m ?
For me, all is fixed by using Exp.CrystalOrientation = rotateframe([Eu0A, Eu0B, Eu0C], rotationaxis, rotationangle) instead of the combination of Exp.CrystalOrientation = [Eu0A, Eu0B, Eu0C] and Exp.SampleRotation={rotationangle, rotationaxis}.

But maybe there is more to question or cross-check? Was the implementation of SampleRotation maybe changed as a change of design or a fix?
Thank you for any feedback!
/Steffen

This difference could be the result of either a bugfix or a new bug,

Can you please post a short script that illustrates the problem? In particular, does the latest dev version behave as you would expect physically, or not?

Now, looking for the simplest minimal example, it appears that Exp.SampleRotation actually does not even have an effect any longer in the current version dev48. Sorry, I could have noticed this earlier. Again, version dev37 was still fine.
I tested using either anisotropic g-factor, or via Sys.D, or via Sys.B2. In any case watching the output of resfields.

Please send a short script that illustrates the issue, so that we can look into it - thanks!

Sys=struct('g',[2.0 2.1 2.2],'S',1/2);
Exp=struct('mwFreq',30,'Range',[0 2000],'CrystalOrientation',[0 0 0]);
rotaxis=[1 1 1];
rotation=45; % deg
Exp.SampleRotation = {rotation/180*pi,rotaxis}; % no effect in dev48 but all fine in dev37
[B_res,~] = resfields(Sys,Exp)

This is indeed a bug - thanks for reporting!

It is fixed now in v6.0.0-dev.49.