Lots of bad articles, including this one which is inspecific about the type of wire. But the motion here is what I’m looking for…
https://www.sciencefriday.com/educational-resources/make-a-memory-wire-circuit/
Her original research: https://docs.google.com/document/d/1btdtX2O7L6veSSyJ2AtJUHx3KFUALVvhfh9PNCw4TPE/edit