Gadolinium Magnet Generator.

[profitis]

That computer programme seems useful yes.I think its best to do the experiment under a belljar of sorts yes to avoid wind.I used to do this kind of experiment in my cupboard shelf and it worked pretty well as there was no movement detectable by the human eye when at equilibrium.if you can get it to move a mere millimeter continuous then its worthwhile.you can also attatch a ruler or stick to the coin and make it swing sideways past the neo like a grandpa clock of sorts.

[profitis]

I wonder if we'l be able to smot a coin mmm

[ekimtoor1]

I wonder if we'l be able to smot a coin mmm

I thought of that and even suggested GD to the folks on the recent SMOT thread. 
I looked everywhere for a GD sphere.  Not available.  Maybe a manufacturing problem.

[TinselKoala]

Once again I apologize for pic format. I'll figure out how to get my iPhone to downsize. Prolly need a different app.  Here is the GD coin suspended over a neo. It swung substantially for a while but is winding down and I would say it's gonna go still

Uhh... you can see now I hope why pix should not be wider than 1024 pixels....
You can download the picture from your iPhone to your computer and resize it using any number of image editing programs. I use "gimp", which is free and powerful (essentially equivalent to Adobe Photoshop) and multi-platform, others may use different programs.
It's rare to need to show a photo at such large size. If you have some detail that needs careful examination you can crop it out of the larger photo and show it at full resolution, just not so wide that it makes comments go off the screen!
800 pixels wide is enough for ordinary purposes; the usual "limit" is 1024 pixels wide before strange things start happening.

As far as the actual experiment goes, you have to be very careful about the suspension fiber itself. Humidity changes can make it twist or untwist, changes in the attraction force, affecting the tension on the fiber, can make it twist or untwist, etc. Many people have been fooled by the twist characteristics of suspension fibers in torsion pendulums (which is essentially what your setup is.)

Tesla (as usual) patented a bunch of different thermomagnetic motor designs that depended on a metal being driven back and forth around its Curie point by an external heat source. I don't think he was aware of gadolinium's low Curie point; he mostly used pure Nickel in his motors. But they are worth taking a look at, the patent is easy enough to find and contains a dozen or more different design drawings. May give you some ideas.

[TinselKoala]

I thought of that and even suggested GD to the folks on the recent SMOT thread. 
I looked everywhere for a GD sphere.  Not available.  Maybe a manufacturing problem.

Yeah, like maybe its melting point of 1312 C makes it difficult to cast in a sinker-mold or by lost-wax methods?
You could probably get someone to machine a sphere out of a commercial billet or barstock, though.