Recently my high school physics teacher contacted me looking for an expert to ask about this situation. I am paraphrasing his correspondence below:
I just had a a student accidentally create magnetic graphene. This has been done before, but we did it very simply by exfoiliating with a magntic stirrer in the presence of a surfactant for over a week. I would like to confirm our discovery, but lack the knowledge and ability to thoroughly test.
It appears that this phenomenon is paramagnetic in nature. The graphene only attracts to a strong magnet when in the presence a constantly changing magnetic field. When the external spinning magnet slows the effect diminishes to zero.
He also provided a youtube video of the experiment. (removed since it is too double edged.)
So, I am turning to the experts here to get advice on the boldface text in the correspondence. What can/should be done to confirm creation of magnetic graphene?
Please note - this question is not about the method used to create, or not create, what may or may not be magnetic graphene. The question is "If I gave you a sample X and asked you to confirm it was magnetic graphene, what experiment might you do?"
UPDATE: (Sorry for the delay) After further tests, my teacher concluded that iron contamination was causing what he observed. Sorry for the anti-climax, but the question is basically not an issue anymore. Thanks for your thoughts.