Magnetise used in a sentence

Magnetise in a sentence as a verb

[1] Yes, yes, it wasn't punch cards or core memory or using a hammer to magnetise rocks...

It is why Evva chose somarium cobalt, due to it being harder to de-magnetise.

I'm just wondering if the tech used back in the days wasn't sophisticated to magnetise cells strongly enough.

I always figured the theory was that if the cell was magnetised twice, you could tell from the magnitude of the resulting field not only its current magnetisation but also its history.