I didn't even know that they didn't have a good explanation related to magnets, as invar for example has a curie point, above which it loses it's neutral therma

I didn't even know that they didn't have a good explanation related to magnets, as invar for example has a curie point, above which it loses it's neutral thermal expansion properties. I've seen it used for low temp things or tooling but for that reason it can't be used for anything really high temperature.