# Puzzled by magnetized aluminum!

For a school project I bought a set of magnets and an aluminum strip. The magnets are places along both sides of the aluminum strip (all in the same direction). Now the aluminum strip is exhibiting magnetization. I was under the impression that aluminum cannot be magnetized. What is the explanation? The strip seems to have opposite polarity vs the magnets near it.

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i would guess the strip is not pure aluminum . –  anna v Feb 18 at 5:46
–  Qmechanic Feb 18 at 7:28
Aluminium is paramagnetic, so external magnets will induce a magnetic field in it. However the magnetic susceptibility is only 2.2 $\times$ 10$^{-5}$ so I'd be surprised if the induced magnetism would be high enough to be noticable. Normally you can only measure paramagnetism in the lab with sensitive equipment.