Simple past tense and past participle of magnetize.(verb)
That has been made magnetic(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "magnetized" in a sentence
"In 1949, Gian Carlo Wick, with whom I had done some work on the scattering of polarized neutrons in magnetized iron while still a graduate student at Chicago University, invited me to be his assistant at the University of California in Berkeley."
"I would especially like to thank Mike W. for going to all of the trouble to glue a few extra planes together, and to get them painted, and "magnetized" in short order."
"And for this reason they should be particularly on guard against allowing themselves to be "magnetized" or influenced psychically by persons of whom they know nothing."