# Other than ultracold lithium gas, are any ferromagnetic or magnetic gasses known or hypothesized?

I'm dealing with an interactive work of fiction right now, and one proposal is to combine two types of puzzles with a magnetic gas. I know that fermionic $$\ce{^6Li}$$, when cooled below $$\pu{1 K}$$, has shown verifiable ferromagnetic properties, but that is far too cold to be applicable to the work's setting.

(I'm only willing to suspend the user's belief so much.)

I know that on heating above the Curie temperature for a material, magnetic properties dissolve; but what that temperature is varies quite a bit. (I've seen them between $$\pu{90 K}$$ and $$\pu{1400 K}$$, which is pretty radical.) Has anyone yet discovered another molecule that remains magnetic in a gaseous phase? Are any of them at least hypothesized?

• Gas, not really, but plasma has magnetic properties and (non-thermal) may have reasonable temperature. – Mithoron Jan 13 at 17:42
• @Mithoron That's helpful, thank you! I was kind of hoping to fit it into a party balloon, though. It's something I can follow up on. Do you have any examples, off hand, of large-scale magnetic plasmas? – Michael Eric Oberlin Jan 13 at 17:53
• – Mithoron Jan 13 at 19:36